ST7265X datasheet(15/166 Pages) STMICROELECTRONICS

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ST7265x

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Figure 8. Smartmedia Card Writer Or Flash Drive Application Example

Table 2. SmartMedia Interface Pin Assignment

(1): This line shows if the ST72F65 pin is controlled by the

ST7 core or the DTC.

(2): These lines are not controlled by the DTC but by the

user software running on the ST7 core. The ST72F65 pin

choice is at customer discretion. The pins shown here are

only shown as an example.

(3): When a single card is to be handled, PA7 is free for

other functions. When 2 Smartmedia are to be handled,

pins from both cards should be tied together (i.e. CLE1

with CLE2...) except for the CE pins. CE pin from card 1

should be connected to PA6 and CE pin from card 2

should be connect to PA7. Selection of the operating card

is done by ST7 software.

(4) As this is a single power supply application, the US-

BEN function in not needed. Thus PF4/USBEN pin can be

used as a normal I/O by configuring it as such by the op-

tion byte.

DTC

FLASH

VDDF

VPP

VDD

POWER

MANAGEMENT

100nF

12V for

level translator

Flash prog.

REGULATOR

I/O

LOGIC

UP TO 2

SMARTMEDIA

CARDS

VDD

I/O

0~7

CTRL

(4)

VCC

USB

USBVDD

USB Port

GND

USB

4.7

µF

USBVDD

USB

GND

=4.0-5.5V

100nF

1.5K

Ω

LED2

LED1

(connect to

GND if

not used)

SmartMedia Pin

I/O0~7

CLE

ALE

R/B

WP(2)

CE1(2)

CE2(2)(3)

ST72F65 pin

PB0-7

PA0

PA1

PA2

PA3

PA4

PA7

PE1

PE0

ST7 / DTC (1)

DTC

ST7

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