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Table 1.5-1 Pin Functions (13 / 13)
Pin number
176 pins
120 pins
168
49
169
50
170
62
171
63
172
-
173
64
174
65
*: These functions are not supported for the 120-pin version.
I/O
Pin name
circuit
type
WR0
D
P84
WR1
IN3
D
P85
SYSCLK
C
P90
P91
C
MCLK
C
P92
P93
C
AS
C
P94
Function
[WR0] is external bus write strobe output.
This function is valid in external bus mode.
[P80] is a general-purpose I/O port.
This function is valid in single-chip mode.
[WR1] is external bus write strobe output.
This function is valid when WR1 output in external bus
mode is allowed.
[IN3] is an input capture input pin.
Since this input is always used when it is selected for input
capture input, output using the port must be stopped
beforehand unless this operation is the intended operation.
[P85] is a general-purpose I/O port.
This function is valid when external bus write enable output
is not allowed.
[SYSCLK] is system clock output.
This function is valid when system clock output is allowed.
A clock having the same frequency as the external bus
operating frequency is output (stopped in stop mode).
[P90] is a general-purpose I/O port.
This function is valid when system clock output is not
allowed.
[P91] is a general-purpose I/O port.
[MCLK] is memory clock output.
This function is valid when memory clock output is
allowed. A clock having the same frequency as the external
bus operating frequency is output (stopped in sleep mode).
[P92] is a general-purpose I/O port.
This function is valid when memory clock output is not
allowed.
[P93] is a general-purpose I/O port.
[AS] is address strobe output.
This function is valid when address strobe output is
allowed.
[P94] is a general-purpose I/O port.
This function is valid when address load output is not
allowed.
25

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