Datasheet
M16C/6S Group Overview
R01DS0201EJ0502 Rev.5.02 page 8 of 203
Dec 25, 2012
Table 1.1.7 Pin Description (1)
NOTES:
1. In case of Direction Register “1”, any signal is not output from M16C to assigned signal of IT800 .
Refer to Programmable I/O Ports pages.
2. Ask the oscillator maker the oscillation characteristic.
VCC, VSS
CNVSS
XIN
XOUT
VCCA
P1
5
Signal name
Power supply
input
CNV
SS
Reset input
Clock input
Clock output
Analog power
supply input
I/O port P1
Apply 3.0V to 3.6V to the V
CC pin.
Apply 0V to the V
SS pin.
Function
This is a pin for changing flash memory mode. Usually, connect to V
SS.
“L” on this input resets the microcomputer.
I/O pins for the main clock generation circuit. Connect a ceramic resonator or crystal
oscillator between X
IN and XOUT (3). To use the external clock, input the clock from
XIN and leave XOUT open.
This pin is a power supply input of analog circuit. Connect to V
CC.
V
CC25
Power supply It is the 2.5V power supply pin which is carrying out internal generating.
Connect VCC25 two pins each other and add stabilization capacity.
This is an 1-bit I/O port equivalent to P6. By choosing by the program,
it functions as an input pin of INT interrupt.
Pin name
Input
Input
Input
Output
Input/outpu
t
I/O type
V
SSA
Analog power
supply input
This pin is a power supply input of analog circuit. Connect to VSS.
GND/TST
Input for test
This is input pin for test. Connect to VSS.
P7
0, P71,
P73, P74,
P76
I/O port P7
It is an I/O port with a function equivalent to P6 (however, P70 N channel open-drain
output). By choosing by the program, it functions as an I/O pin of timers A0 to A3.
Moreover, P70 to P73 function also as an I/O pin of UART2.
Input/output
P8
0, P81,
P83, P84,
P85
I/O port P8
P80, P81, P83, and P84 are I/O ports with a function equivalent to P6.
By choosing by the program, P80 to P81 function as an I/O pin of timer A4,
and P83 to P84 functions as an input pin of INT interruption.
Input/output
Input port
P8
5
P85 cannot be used as general input pin. Pull-up resistance cannot set up this pin.
This pin must be pulled-up externally to Vcc, and be fixed to “H”.
Input
keep Input
P60 to P67 I/O port P6
This is the 8-bit I/O port of CMOS. It has a direction register for choosing I/O, and is
made for every pin in an input port or an output port. An input port can choose the
existence of pull-up resistance in a 4-bit unit by the program. It functions as an I/O pin
of what is chosen by the program which are therefore UART0 and UART1.
It is an I/O port with a function equivalent to P6. It functions as an I/O pin of SILO3 by
choosing by the program.
Input/output
P9
TS
0 to P92 I/O port P9
Inner port P1
0
Input/output
Port for IT800 Testing. Please set Direction Register PD1_0 “0” for keeping Input.
P10
keep Input
Inner port P1
1
Port for AFE Testing. Please set Direction Register PD1_1 “0” for keeping Input.
P11
P40
Output to
IT800
Inner port
P4
0
I/O Port for communication between M16C Core and IT800 Modem. Please set
Direction Register PD4_0 “1” to Output a signal to IT800. The output signal is
connected to TXnRX of IT800 inside of chip.
P41
Input from
IT800
Inner port
P4
1
I/O Port for communication between M16C Core and IT800 Modem (Note.1).
Please set Direction Register PD4_1 “0” to Input a signal from IT800. The TS signal is
input from IT800 inside of chip.
P4
2
Output to
IT800
Inner port
P4
2
I/O Port for communication between M16C Core and IT800 Modem. Please set
Direction Register PD4_2 “1” to Output a signal to IT800. The output signal is
connected to CLR of IT800 inside of chip.
P5
3
Input from
IT800
Inner port
P5
3
I/O Port for communication between M16C Core and IT800 Modem (Note.1).
Please set Direction Register PD5_3 “0” to Input a signal from IT800. The nCD0
signal is input from IT800 inside of chip.
P5
4
Input from
IT800
Inner port
P5
4
I/O Port for communication between M16C Core and IT800 Modem (Note.1).
Please set Direction Register PD5_4 “0” to Input a signal from IT800. The nCD1
signal is input from IT800 inside of chip.
P5
6
Output to
IT800
Inner port
P5
6
I/O Port for communication between M16C Core and IT800 Modem. Please set
Direction Register PD5_6 “1” to Output a signal to IT800. The output signal is
connected to nPHY_RES of IT800 inside of chip.
P8
2
Input from
IT800
Inner port
P8
2
I/O Port for communication between M16C Core and IT800 Modem (Note.1).
nINT signal of IT800 is connected to this port inside of chip for carrying out Interrupt
function by software.
P9
5
Output to
IT800
Inner port
P9
5
I/O Port for communication between M16C Core and IT800 Modem. This port is
connected to DCLK signal of IT800 inside of chip as SILO4 CLK4 functional Output
port by choosing by the program.
P9
6
Output to
IT800
Inner port
P9
6
I/O Port for communication between M16C Core and IT800 Modem. This port is
connected to DI signal of IT800 inside of chip as SILO4 SOUT4 functional Output port
by choosing by the program.
P9
7
Input from
IT800
Inner port
P9
7
I/O Port for communication between M16C Core and IT800 Modem. This port is
connected to DI signal of IT800 inside of chip as SILO4 SOUT4 functional Input port
by choosing by the program.
This is the pin with which IT800 controls ON/OFF of an output to the external
transmission AMP at the time of power line communication.
Output port
TS
Output
RESE
T
Input