HT85F2270 datasheet(13/226 Pages) HOLTEK

13 / 226 page

Rev. 1.00

1� of ��6

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Standard 8051 8-Bit Flash MCU

HT85F2260/HT85F2270/HT85F2280

Voltage Reference Generator Block Diagram........................................................................................ 169

Comparator 0......................................................................................................................................... 170

Comparator 1......................................................................................................................................... 171

I�C �aster Slave Bus Connection.......................................................................................................... 177

I�C Interface Operation Flow.................................................................................................................. 177

I�C Block Diagram.................................................................................................................................. 181

I�C Bus Initialisation Flow Chart ............................................................................................................ 18�

I�C Communication Timing Diagram...................................................................................................... 184

Single SPI �aster and single Slave Connection ................................................................................... 190

SPI Interface Block Diagram.................................................................................................................. 191

SPI �aster �ode Timing ....................................................................................................................... 19�

SPI Slave �ode Timing – CPHA=0 ....................................................................................................... 196

SPI Slave �ode Timing – CPHA=1 ....................................................................................................... 196

SPI Transfer Control Flowchart.............................................................................................................. 197

Basic UART Data Transfer Diagram...................................................................................................... 199

UART 0 Block Diagram.......................................................................................................................... �00

UART0 �ode 0 Timing Diagram............................................................................................................ �0�

UART0 �ode 1 Timing Diagram............................................................................................................ �06

UART0 �ode � Timing Diagram............................................................................................................ �07

UART0 �ode � Timing Diagram............................................................................................................ �08

UART0 Baud Rate Generator................................................................................................................ �09

UART1 Block Diagram........................................................................................................................... �10

UART1 �ode A Timing Diagram............................................................................................................ �14

UART1 �ode B Timing Diagram............................................................................................................ �1�

UART1 Baud Rate Generator................................................................................................................ �16

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