![](http://datasheet.mmic.net.cn/30000/M30280M8V-XXXHP_datasheet_2358818/M30280M8V-XXXHP_336.png)
19. Flash Memory Version
page 316
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Table 19.8 Pin Descriptions (Flash Memory Standard Serial I/O Mode)
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.
Pin
Descriptio
n
VCC,VSS
Apply the voltage guaranteed for Program and Erase to Vcc pin and 0
V to Vss pin.
CNVSS
Connect to Vcc pin.
RESET
XIN
Connect a ceramic resonator or crystal oscillator between XIN and
XOUT pins. To input an externally generated clock, input it to XIN pin
and open XOUT pin.
XOUT
AVCC, AVSS
VREF
Connect AVss to Vss and AVcc to Vcc, respectively.
Enter the reference voltage for AD conversion.
P00 to P07
Input "H" or "L" level signal or leave open.
P10 to P15, P17
Input "H" or "L" level signal or leave open.
P30 to P37
Input "H" or "L" level signal or leave open.
P60 to P63
Input "H" or "L" level signal or leave open.
P64
Standard serial I/O mode 1: BUSY signal output pin
Standard serial I/O mode 2: Monitor signal output pin for boot program
operation check
P65
P66
Serial data input pin
P67
Serial data output pin
P70 to P77
Input "H" or "L" level signal or leave open.
P80 to P84,
P87
Input "H" or "L" level signal or leave open.
P90 to P93,
P95 to P97
Input "H" or "L" level signal or leave open.
Name
Power input
CNVS
S
Reset input
Clock input
Clock output
Analog power supply input
Reference voltage input
Input port P0
Input port P1
Input port P3
Input port P6
BUSY output
SCLK input
RxD input
TxD output
Input port P7
Input port P8
Input port P9
I/O
I
O
I
O
I
O
I
P85
RP input
I
Connect this pin to Vss while RESET pin is “L”. (Note 2)
Standard serial I/O mode 1: Serial clock input pin
Standard serial I/O mode 2: Input "L".
Reset input pin. While RESET pin is "L" level, wait for td(ROC).
(Note 1)
P20 to P27
Input port P2
Input "H" or "L" level signal or leave open.
I
P86
CE input
I
Connect this pin to Vcc while RESET pin is “L”. (Note 2)
P16
Input port P1
I
Connect this pin to Vcc while RESET pin is “L”. (Note 2)
P100 to P107
Input "H" or "L" level signal or leave open.
Input port P10
I