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MB91F155PFV-G

32-bit Proprietary Microcontrollers

Fujitsu 

MB91F155/MB91154

Pin No. Pin name

46

BGRNT/P81

47

BRQ/P82

48

RD/P83

49

WR0/P84

50

WR1/P85

51

CLK/P86

52

MD2

53

MD1

54

MD0

55

RST

57

X1

58

X0

60

INT0/PC0

61

INT1/PC1

62

INT2/PC2

63

INT3/PC3

Circuit

type

Function

External bus release acceptance output

This function is enabled when external bus release acceptance output is

F

allowed.

Output “L” upon releasing of the external bus.

This pin is available as a port when external bus release acceptance out-

put is not allowed.

External bus release request input

This function is enabled when external bus release request input is al-

C

lowed.

Input “1” when the release of the external bus is desired.

This pin is available as a port when external bus release request input is

not in use.

External bus read strobe output

F

This function is enabled when external bus read strobe output is allowed.

This pin is available as a port when external bus read strobe output is not

allowed.

External bus write strobe output

F This function is enabled in external bus mode.

This pin is available as a port in single chip mode.

External bus write strobe output

This function is enabled in external bus mode when the bus width is 16

F bits.

This pin is available as a port in single chip mode or when the external bus

width is 8 bits.

System clock output

F The pin outputs the same clock as the external bus operating frequency.

The pin is available as a port when it is not used to output the clock.

Mode pins

G To use these pins, connect them directly to either Vcc or Vss.

Use these pins to set the basic MCU operating mode.

B External reset input

A High-speed clock oscillation pins (16.5 MHz)

External interrupt request input 0-3

Since this input is used more or less continuously when the corresponding

external interrupt is allowed, output by the port needs to be stopped ex-

H

cept when it is performed deliberately.

Since this port is allowed to input also in standby mode, it can be used to

reset the standby state.

These pins are available as ports when external interrupt request input is

not in use.

(Continued)

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