CS5954AM
ADVANCE
INFORMATION
Document #: 38-08025 Rev. **
Page 3 of 44
4.11 Interrupts ..................................................................................................................................... 15
4.11.1 Hardware Interrupts .......................................................................................................................... 15
4.11.2 Interrupt Enable Register (0xC00E: R/W) ........................................................................................ 15
4.11.3 GPIO Interrupt Control Register (0xC01C: R/W) ............................................................................. 16
4.11.4 Software Interrupts ............................................................................................................................ 16
4.12 Serial EEPROM Interface (2-wire serial interface) ................................................................... 17
4.13 External SRAM ............................................................................................................................ 18
4.13.1 Memory Control Register (0xC03E: R/W) ........................................................................................ 18
4.13.2 Extended Memory Control Register (0xC03A: R/W) ....................................................................... 18
4.13.3 Extended Page 1 Map Register (0xC018: R/W) ............................................................................... 19
4.13.4 Extended Page 2 Map Register (0xC01A: R/W) ..............................................................................19
4.13.5 Memory Map ....................................................................................................................................... 19
4.14 General Timers and Watchdog Timer ....................................................................................... 20
4.14.1 Timer 0 Count Register (0xC010: R/W) ............................................................................................ 20
4.14.2 Timer 1 Count Register (0xC012: R/W) ............................................................................................ 20
4.14.3 Watchdog Timer Count and Control Register (0xC00C: R/W) ....................................................... 21
4.15 Special GPIO Function for Suspend, Resume and Low-power Modes ................................. 21
5.0 CS5954AM INTERFACE MODES ................................................................................................. 21
5.1 General-purpose I/O Mode (GPIO) .............................................................................................. 21
5.1.1 I/O Control Register 0 (0xC022: R/W) ................................................................................................ 22
5.1.2 I/O Control Register 1 (0xC028: R/W) ................................................................................................ 22
5.1.3 Output Data Register 0 (0xC01E: R/W) .............................................................................................. 22
5.1.4 Output Data Register 1 (0xC024: R/W) .............................................................................................. 22
5.1.5 Input Data Register 0 (0xC020: Read only) ....................................................................................... 22
5.1.6 Input Data Register 1 (0xC026: Read-only) ....................................................................................... 22
5.1.7 I/O Address Map .................................................................................................................................. 23
6.0 PIN ASSIGNMENTS ...................................................................................................................... 25
6.1 Pin Diagram ................................................................................................................................... 25
7.0 PHYSICAL CONNECTION ............................................................................................................ 26
7.1 Package Type ................................................................................................................................ 26
7.2 Pin Assignment and Description ............................................................................................... 26
8.0 CS5954AM CPU PROGRAMMING GUIDE ................................................................................... 28
8.1 Instruction Set Overview .............................................................................................................. 28
8.2 Reset Vector .................................................................................................................................. 28
8.3 Register Set ................................................................................................................................... 28
8.4 General-purpose Registers .......................................................................................................... 29
8.5 General-purpose/Address Registers ..........................................................................................29
8.6 REGBANK Register (0xC002: R/W) .............................................................................................29
8.7 Flags Register (0xC000: Read-only) ........................................................................................... 29
8.8 Instruction Format ........................................................................................................................ 29
8.9 Addressing Modes ........................................................................................................................ 30
8.10 Register Addressing ................................................................................................................... 30
8.11 Immediate Addressing ............................................................................................................... 30
8.12 Direct Addressing ....................................................................................................................... 30
8.13 Indirect Addressing .................................................................................................................... 30
8.14 Indirect Addressing with Auto Increment ................................................................................ 31
8.15 Indirect Addressing with Offset ................................................................................................ 31
8.16 Stack Pointer (R15) Special Handling ....................................................................................... 31
8.17 Dual Operand Instructions ......................................................................................................... 31
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