Shanghai Belling-Systron Microelectronics Co., Ltd.
W
$02
PORTC
R
W
$04
DDRA
R
W
$05
DDRB
R
W
$08
TDR
R
W
$09
TCR
R
W
$0A
POPR
R
W
$0B
KBIM
R
W
$0C
MCR
R
W
$90
RCR
R
W
$91
RAR
R
W
$92
RSR
R
W
$93
RMR
R
W
$94
RHR
R
W
$95
RDR
R
W
$96
RMOR
R
W
$97
RYR
R
W
$98
RWR
R
W
WK2
WK1
WK0
YR7
YR6
YR5
YR4
YR3
YR2
YR1
YR0
MON4
MON3
MON2
MON1
MON0
DAY5
DAY4
DAY3
DAY2
DAY1
DAY0
HR5
HR4
HR3
HR2
HR1
HR0
MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
SEC6
SEC5
SEC4
SEC3
SEC2
SEC1
SEC0
0
RTCIE
RTCIF
XSL
F6
F5
ADJ
F4
F3
F2
F1
F0
0
KBIE
KBIC
XSTP
FLAG
CT1
CT0
RTCT
F38KE
KBE7
KBE6
KBE5
KBE4
KBE3
KBE2
KBE1
KBE0
0
TIF
TIM
PRER
PBP
PB1
PB0
PR2
PR1
PR0
TD7
TD6
TD5
TD4
TD3
TD2
TD1
TD0
DDRB7
DDRB6
DDRB5
DDRB4
DDRB3
DDRB2
DDRB1
DDRB0
DDRA7
DDRA6
DDRA5
DDRA4
DDRA3
DDRA2
DDRA1
DDRA0
PC0
unaffected
0000 0000
0000 0000
1111 1111
0100 0100
---- -000
0000 0000
000- ---0
01-1 00-0
unaffected
unaffected
unaffected
unaffected
unaffected
unaffected
unaffected
unaffected
3.2.1 A
PORTA
A
PORTA
Port A Data Register
I/O
I/O
PA7:PA0
I/O
I/O
PORTA
PORTA
I/O
BELLING [ SHANGHAI BELLING CO., LTD. ]
