p87c51mc2 NXP Semiconductors, p87c51mc2 Datasheet - Page 9

• Manufacturer Part Number: p87c51mc2
• Description: 80c51 8-bit Microcontroller Family With Extended Memory
• Manufacturer: NXP Semiconductors

SPECIAL FUNCTION REGISTERS
Note: Special Function Register (SFR) accesses are restricted in the following ways:
1. User must NOT attempt to access any SFR locations not defined.
2. SFR bits labeled ’-’, ’0’ or ’1’ can ONLY be written and read as follows:
Special Function Registers
2001 Apr 06
Philips Semiconductors
ACC*
AUXR#
AUXR1#
B*
BRGR0#§
BRGR1#§
BRGCON# Baud Rate Generator Control
CCAP0H#
CCAP1H#
CCAP2H#
CCAP3H#
CCAP4H#
CCAP0L#
CCAP1L#
CCAP2L#
CCAP3L#
CCAP4L#
CCAPM0# Module 0 Mode
CCAPM1# Module 1 Mode
CCAPM2# Module 2 Mode
CCAPM3# Module 3 Mode
CCAPM4# Module 4 Mode
SYMBOL
80C51 8-bit microcontroller family with extended memory
64KB/96KB OTP with 2KB/3KB RAM
- ’-’ MUST be written with ’0’, but can return any value when read (even if it was written with ’0’). It is a reserved bit and may
- ’0’ MUST be written with ’0’, and will return a ’0’ when read.
- ’1’ MUST be written with ’1’, and will return a ’1’ when read.
be used in future derivatives.
Accumulator
Auxiliary Function Register
Auxiliary Function Register 1
B Register
Baud Rate Generator Rate Low
Baud Rate Generator Rate High
Module 0 Capture High
Module 1 Capture High
Module 2 Capture High
Module 3 Capture High
Module 4 Capture High
Module 0 Capture Low
Module 1 Capture Low
Module 2 Capture Low
Module 3 Capture Low
Module 4 Capture Low
DESCRIPTION
ADDRESS
DIRECT
86H
87H
85H
ECH
EDH
DAH
DBH
DCH
DDH
DEH
E0H
8EH
A2H
FAH
FBH
FCH
FDH
FEH
EAH
EBH
EEH
F0H
‡
‡
‡
BRATE11 BRATE10 BRATE9
BRATE3
MSB
E7
F7
-
-
-
-
-
-
-
-
ECOM_0
ECOM_1
ECOM_2
ECOM_3
ECOM_4
BRATE2
BIT ADDRESS, SYMBOL, OR ALTERNATE PORT FUNCTION
E6
F6
-
-
-
9
BRATE1
CAPP_0
CAPP_1
CAPP_2
CAPP_3
CAPP_4
E5
F5
-
-
-
BRATE8
BRATE0
CAPN_0
CAPN_1
CAPN_2
CAPN_3
CAPN_4
LPEP
E4
F4
-
-
BRATE7
MAT_0
MAT_1
MAT_2
MAT_3
MAT_4
GF2
E3
F3
-
-
-
P87C51MB2/P87C51MC2
BRATE6
TOG_0
TOG_1
TOG_2
TOG_3
TOG_4
E2
F2
0
-
-
-
EXTRAM
S0BRGS
BRATE5
PWM_0
PWM_1
PWM_2
PWM_3
PWM_4
E1
F1
-
-
Preliminary specification
BRATE4
ECCF_0
ECCF_1
ECCF_2
ECCF_3
ECCF_4
BRGEN
DPS
LSB
AO
E0
F0
-
Reset
Value
00H
00H
00H
00H
00H
00H
00H
00H
00H
XXH
XXH
XXH
XXH
XXH
XXH
XXH
XXH
XXH
XXH
00H
00H
00H
%
%
%
%
%
%
%
%
%