MC81F4216 Datasheet, PDF (17/200 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

3.6 20 PDIP/SOP
MC81F4x16
EC1/SCK/EXT2/AN2/R04
PWM1O/T1O/SI/EXT3/AN3/R05
EC2/SO/EXT4/AN4/R06
(SDATA) T2O/EXT5/AN5/R07
VDD
Vref/EXT6/R10
(SCLK) PWM2O/EXT7/AN6/R11
RxD/R14
TxD/R15
AN10/R25
1
20
2
19
3
18
4
17
5 _MC81F4216 16
6
15
7
14
8
13
9
12
10
11
R03/AN1/EXT1/T0O/PWM0O
R02/AN0/EXT0/EC0
SXout/R01/EXT11
SXin/R00/EXT10
Vss
RESETB/R35/VPP
Xin/R34
Xout/R33
R27/AN12
R26/AN11
Note:
* You must set R12 port as an low OUTPUT mode even it is not exist in 20pin package.
*
In fact, R12 port is exist in side of the package and it‟s reset status is input mode. If it is in
input mode it course current leakage when the MCU falls in stop/sleep mode. So you must
set it as an output mode before fall in stop/sleep.
It is recommendable to set R12 port as an low OUTPUT mode at initial time.
October 19, 2009 Ver.1.35
17