Renesas M16C/60 Series Hardware Manual page 21

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M16C/6N5 Group
Table 1.1.4 Pin Description (2)
Pin name Signal name
P5 to P5 I/O port P5
0 7
WRL / WR,
WRH / BHE,
RD,
BCLK,
HLDA,
HOLD,
ALE,
RDY
P6 to P6 I/O port P6
0 7
P7 to P7 I/O port P7
0 7
P8 to P8 , I/O port P8
0 4
P8 ,
6
P8
7
P8 Input port P8
5
P9 to P9 I/O port P9
0 7
P10 to P10 I/O port P10
0 7
Rev.1.00 2003.05.30 page 7
I/O type
Input/output This is an 8-bit I/O port equivalent to P0. In single-chip mode, P5
port outputs a divide-by-8 or divide-by-32 clock of X
same frequency as X
Output Output WRL/WR, WRH/BHE, RD, BCLK, HLDA, and ALE signals.
Output WRL/WR and WRH/BHE are switchable in a program. Note that WRL and
Output WRH are always used as a pair, so as WR and BHE.
Output WRL, WRH, and RD selected
Output If the external data bus is a 16-bit width, data are written to even addresses
Input when the WRL signal is low, and written to odd addresses when the
Output WRH signal is low. Data are read out when the RD signal is low.
Input WR, BHE, and RD selected
Data are written when the WR signal is low, or read out when the RD
signal is low. Odd addresses are accessed when the BHE signal is low.
Use this mode when the external data bus is an 8-bit width.
The microcomputer goes to a hold state when input to the HOLD pin is
held low. While in the hold state, HLDA outputs a low level. ALE is used
to latch the address. While the input level of the RDY pin is low, the bus
of the microcomputer goes to a wait state.
Input/output This is an 8-bit I/O port equivalent to P0. Pins in this port also function as
UART0 and UART1 I/O pins as selected by program.
Input/output This is an 8-bit I/O port equivalent to P0 (P7
output). This port can function as input/output pins for timers A0 to A3
when so selected in a program.
Furthermore, P7
as input/output pins for UART2, an input pin for timer B5, and output pins
for the three-phase motor control timer, respectively.
Input/output P8 to P8
0
Input/output When so selected in a program, P8
Input/output input/output pins for timer A4 or output pins for the three-phase motor
control timer and INT interrupt input pins, respectively.
P8 and P8
6
pins for the sub clock oscillator circuit.
In that case, connect a crystal resonator between P8
P8 (X
7 CIN
Input P8 is an input-only port shared with NMI. An NMI interrupt request is
5 5
generated when input on this pin changes state from high to low.
The NMI function cannot be disabled in a program.
A pull-up cannot be set for this pin.
Input/output This is an 8-bit I/O port equivalent to P0 (P9
output). Pins in this port also function as input/output pins for SI/O3, input
pins for times B0 to B4, output pins for D-A converter, and input pins for
A-D converter or input/output pins for CAN0, or input pins for A-D trigger
as selected by program.
Input/output This is an 8-bit I/O port equivalent to P0. Pins in this port also function as
input pins for A-D converter as selected by program.
Furthermore, P10
interrupt function.
Function
as selected by program.
CIN
to P7 , P7 , P7 to P7
0 3 1 2
, P8 and P8 are I/O ports with the same functions as P0.
4 6 7
, P8
0
, when so selected in a program, both can function as input/output
7
pin).
to P10 also function as input pins for the key input
4 7
Overview
in this
7
or a clock of the
IN
is an N channel open-drain
1
and P7 , P7 can also function
5 6 7
, and P8 to P8 can function as
1 2 4
(X pin) and
6 COUT
is an N channel open-drain
1