MB90F546GSPF datasheet(10/70 Pages) CYPRESS

10 / 70 page

Document Number: 002- 07696 Rev. *A

Page 10 of 70

MB90540G/545G Series

(Continued)

Pin No.

Pin name

Circuit type

Function

LQFP*2

QFP*1

P33

General I/O port with programmable pullup. This function is enabled in the

single-chip mode, external bus 8-bit mode or when WRH pin output is disabled.

WRH

Write strobe output pin for the 8 higher bits of the data bus. This function is

enabled when the external bus is enabled, when the external bus 16-bit mode

is selected, and when the WRH output pin is enabled.

P34

General I/O port with programmable pullup. This function is enabled in the

single-chip mode or when the hold function is disabled.

HRQ

Hold request input pin. This function is enabled when both the external bus

and the hold functions are enabled.

P35

General I/O port with programmable pullup. This function is enabled in the

single-chip mode or when the hold function is disabled.

HAK

Hold acknowledge output pin. This function is enabled when both the external

bus and the hold functions are enabled.

P36

General I/O port with programmable pullup. This function is enabled in the

single-chip mode or when the external ready function is disabled.

RDY

Ready input pin. This function is enabled when both the external bus and the

external ready functions are enabled.

P37

General I/O port with programmable pullup. This function is enabled in the

single-chip mode or when the CLK output is disabled.

CLK

CLK output pin. This function is enabled when both the external bus and CLK

outputs are enabled.

P40

General I/O port. This function is enabled when UART0 disables the serial

data output.

SOT0

Serial data output pin for UART0. This function is enabled when UART0

enables the serial data output.

P41

General I/O port. This function is enabled when UART0 disables serial clock

output.

SCK0

Serial clock I/O pin for UART0. This function is enabled when UART0 enables

the serial clock output.

P42

General I/O port. This function is always enabled.

SIN0

Serial data input pin for UART0. Set the corresponding Port

Direction Register to input if this function is used.

P43

General I/O port. This function is always enabled.

SIN1

Serial data input pin for UART1. Set the corresponding Port

Direction Register to input if this function is used.

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