MB90246A Ver la hoja de datos (PDF) - Fujitsu

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MB90246A

(MB90220 Series) 16-bit Proprietary Microcontroller

Fujitsu 

MB90246A Series

s PIN DESCRIPTION

Pin no.

LQFP*

80

81

47 to 49

Pin name

X0

X1

MD0 to MD2

75

50

91 to 98

RST

HST

P10 to P17

D08 to D15

16 to 20, P40 to P44,

22 to 24 P45 to P47

A16 to A20,

A21 to A23

70 P50

CLK

71 P51

RDY

72 P52

HAK

73 P53

HRQ

74 P54

WRH

* : FPT-100P-M05

Circuit

type

A

Function

This is a crystal oscillator pin.

C

This is an input pin for selecting operation modes.

Connect directly to VCC or VSS.

B

This is external reset request signal.

C

This is a hardware stand-by input pin.

D

This is a general-purpose I/O port.

This function is valid in the 8-bit mode where the external bus is

valid.

This is an I/O pin for the upper 8-bit of the external address data

bus.

This function is valid in the 16-bit mode where the external bus is

valid.

E

This is a general-purpose I/O port.

This function becomes valid in the bit where the upper address

control register is set to select a port.

This is an output pin for the upper 8-bit of the external address bus.

This function is valid in the mode where the external bus is valid

and the upper address control register is set to select an address.

E

This is a general-purpose I/O port.

This function becomes valid when the CLK output is disabled.

This is a CLK output pin.

This function becomes valid when CLK output is enabled.

D

This is a general-purpose I/O port.

This function becomes valid when the external ready function are

disabled.

This is a ready input pin.

This function becomes valid when the external ready function is

enabled.

D

This is a general-purpose I/O port.

This function becomes valid when the hold function are disabled.

This is a hold acknowledge output pin.

This function becomes valid when the hold function is enabled.

D

This is a general-purpose I/O port.

This function becomes valid when the hold function are disabled.

This is a hold request input pin.

This function becomes valid when the hold function is enabled.

E

This is a general-purpose I/O port.

This function becomes valid, in the external bus 8-bit mode, or

WRH pin output is disabled.

This is a write strobe output pin for the upper 8-bit of the data bus.

This function becomes valid when the external bus 16-bit mode is

selected, and WRH output pin is enabled.

(Continued)

7

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