R01UH0092EJ0110 Rev.1.10
Page 704 of 807
Jul 31, 2012
M16C/64C Group
30. Flash Memory
30.9.5
Standard Serial I/O Mode 2
In standard serial I/O mode 2, a serial programmer is connected to the MCU by using 2-wire clock
asynchronous serial I/O. The main clock is used.
Table 30.24
Pin Functions (Flash Memory Standard Serial I/O Mode 2)
Pin
Name
I/O
Power
Supply
Description
VCC1, VCC2,
VSS
Power input
-
Apply the flash memory program and erase voltage to the
VCC1 pin, and VCC2 to the VCC2 pin. The VCC application
condition is that VCC2
≤
VCC1. Apply 0 V to the VSS pin.
CNVSS
CNVSS
I
VCC1
Connect to the VCC1 pin.
RESET
Reset input
I
VCC1
Reset input pin.
XIN
Clock input
I
VCC1
Connect a ceramic resonator or crystal between pins XIN and
XOUT. To input an externally generated clock, input it to the
XIN pin and open the XOUT pin.
XOUT
Clock output
O
VCC1
BYTE
BYTE input
I
VCC1
Connect this pin to VSS or VCC1.
AVCC, AVSS
Analog power
supply input
Connect the AVCC pin to VCC1 and the AVSS pin to VSS.
VREF
Reference
voltage input
I
Reference voltage input pin for A/D converter. When using
standard serial I/O mode 2, and power supply to VREF is not
supplied, connect with VSS.
P0_0 to P0_7
Input port P0
I
VCC2
Input a high- or low-level signal or leave open.
P1_0 to P1_7
Input port P1
I
VCC2
Input a high- or low-level signal or leave open.
P2_0 to P2_7
Input port P2
I
VCC2
Input a high- or low-level signal or leave open.
P3_0 to P3_7
Input port P3
I
VCC2
Input a high- or low-level signal or leave open.
P4_0 to P4_7
Input port P4
I
VCC2
Input a high- or low-level signal or leave open.
P5_1 to P5_4,
P5_6, P5_7
Input port P5
I
VCC2
Input a high- or low-level signal or leave open.
P5_0
CE
input
I
VCC2
Input a high-level signal.
P5_5
EPM
input
I
VCC2
Input a low-level signal.
P6_0 to P6_3
Input port P6
I
VCC1
Input a high- or low-level signal or leave open.
P6_4 /
RTS1
BUSY output
O
VCC1
Monitor signal output pin for checking the boot program
operation.
P6_5/CLK1
SCLK input
I
VCC1
Input a low-level signal
P6_6 / RXD1
RXD input
I
VCC1
Serial data input pin.
P6_7 / TXD1
TXD output
O
VCC1
Serial data output pin.
P7_0 to P7_7
Input port P7
I
VCC1
Input a high- or low-level signal or leave open.
P8_0 to P8_7
Input port P8
I
VCC1
Input a high- or low-level signal or leave open.
P9_0 to P9_7
Input port P9
I
VCC1
Input a high- or low-level signal or leave open.
P10_0 to P10_7
Input port P10
I
VCC1
Input a high- or low-level signal or leave open.
Содержание M16C Series
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