M16C28 Datasheet, PDF (342/423 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/28 Group (M16C/28, M16C/28B)
18. Flash Memory Version
Table 18.8 Pin Descriptions (Flash Memory Standard Serial I/O Mode)
Pin
Name
I/O
Description
VCC,VSS
Power input
Apply the voltage guaranteed for Program and Erase to Vcc pin and 0
V to Vss pin.
CNVSS
CNVSS
I Connect to Vcc pin.
RESET
Reset input
XIN
Clock input
XOUT
Clock output
AVCC, AVSS
Analog power supply input
Vref
P00 to P07
Reference voltage input
Input port P0
P10 to P15, P17 Input port P1
I Reset input pin. While RESET pin is "L" level, wait for td(ROC).
I Connect a ceramic resonator or crystal oscillator between XIN and
XOUT pins. To input an externally generated clock, input it to XIN pin
O and open XOUT pin.
Connect AVss to Vss and AVcc to Vcc, respectively.
I Enter the reference voltage for AD conversion.
I Input "H" or "L" level signal or leave open.
I Input "H" or "L" level signal or leave open.
P16
P16 input
I Connect this pin to Vcc while RESET pin is “L”. ⁽²⁾
P20 to P27
Input port P2
I Input "H" or "L" level signal or leave open.
P30 to P37
Input port P3
I Input "H" or "L" level signal or leave open.
P60 to P63
P64
P65
P66
Input port P6
BUSY output
SCLK input
RxD input
I Input "H" or "L" level signal or leave open.
Standard serial I/O mode 1: BUSY signal output pin
O Standard serial I/O mode 2: Monitor signal output pin for boot program
operation check
I
Standard serial I/O mode 1: Serial clock input pin
Standard serial I/O mode 2: Input "L".
I Serial data input pin
P67
TxD output
O Serial data output pin ⁽¹⁾
P70 to P77
P80 to P84,
P87
P85
Input port P7
Input port P8
RP input
I Input "H" or "L" level signal or leave open.
I Input "H" or "L" level signal or leave open.
I Connect this pin to Vss while RESET pin is “L”. ⁽²⁾
P86
CE input
I Connect this pin to Vcc while RESET pin is “L”. ⁽²⁾
P90 to P91,
P95 to P97
Input port P9
I Input "H" or "L" level signal or leave open.
P92
Input port P92
I Input "H" or "L" level signal or leave open.
128K
I/O Output "H" level signal for specific time. Input "H" level signal or leave open.
P93
Input port P93
others
I Input "H" or "L" level signal or leave open.
P100 to P107 Input port P10
I Input "H" or "L" level signal or leave open.
NOTES:
___________
1. When using standard serial I/O mode 1, to input “H” to the TxD pin is necessary while the RESET pin
is held “L”. Therefore, connect this pin to VCC via a resistor. Adjust the pull-up resistor value on a
system not to affect a data transfer after reset, because this pin changes to a data-output pin
2. Set the following, either or both.
_____
-Connect the CE pin to VCC.
_____
-Connect the RP pin to VSS and P16 pin to VCC.
Rev. 2.00 Jan. 31, 2007 ^{page 322} of 385
REJ09B0047-0200