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| IS80LV51 Datasheet, PDF (10/43 Pages) Integrated Silicon Solution, Inc – CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER | |||
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IS80LV51
IS80LV31
ISSI ®
Table 2: Special Function Register
Symbol
Description
Direct Address
Bit Address, Symbol, or Alternative Port Function
ACC(1)
Accumulator
E0H
B(1)
B register
F0H
DPH Data pointer (DPTR) high 83H
DPL Data pointer (DPTR) low 82H
IE(1)
Interrupt enable
A8H
IP(1)
Interrupt priority
B8H
P0(1)
Port 0
80H
P1(1)
Port 1
90H
P2(1)
Port 2
A0H
P3(1)
Port 3
B0H
PCON
Power control
87H
PSW(1) Program status word
D0H
SBUF
Serial data buffer
99H
SCON(1)
Serial controller
98H
SP
Stack pointer
81H
TCON(1)
Timer control
88H
TMOD
Timer mode
89H
TH0
Timer high 0
8CH
TH1
Timer high 1
8DH
TL0
Timer low 0
8AH
TL1
Timer low 1
8BH
E7 E6
F7 F6
E5 E4 E3 E2 E1 E0
F5 F4 F3 F2 F1 F0
AF AE
EA â
AD AC AB AA A9 A8
â ES ET1 EX1 ET0 EX0
BF BE
ââ
BD BC BB BA B9 B8
â PS PT1 PX1 PT0 PX0
87 86
P0.7 P0.6
AD7 AD6
85 84 83 82 81 80
P0.5 P0.4 P0.3 P0.2 P0.1 P0.0
AD5 AD4 AD3 AD2 AD1 AD0
97 96 95 94 93 92 91 90
P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0
A7 A6 A5 A4 A3 A2 A1 A0
P2.7 P2.6 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0
AD15 AD14 AD13 AD12 AD11 AD10 AD9 AD8
B7 B6 B5 B4 B3 B2 B1 B0
P3.7 P3.6 P3.5 P3.4 P3.3 P3.2 P3.1 P3.0
RD WR T1 T0 INT1 INT0 TXD RXD
SMOD â â â GF1 GF0 PD IDL
D7 D6
CY AC
D5 D4 D3 D2 D1 D0
F0 RS1 RS0 OV â P
9F 9E 9D 9C 9B 9A 99 98
SM0 SM1 SM2 REN TB8 RB8 TI RI
8F 8E
TF1 TR1
GATE C/T
8D 8C 8B 8A 89 88
TF0 TR0 IE1 IT1 IE0 IT0
M1 M0 GATE C/T M1 M0
Note:
1. Denotes bit addressable.
Reset Value
00H
00H
00H
00H
0XX00000B
XXX00000B
FFH
FFH
FFH
FFH
0XXX0000B
00H
XXXXXXXXB
00H
07H
00H
00H
00H
00H
00H
00H
10
Integrated Silicon Solution, Inc.
ADVANCE INFORMATION MC018-0A
10/01/98
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