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HMS99C52 Datasheet, PDF (17/43 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS
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HMS99C5X Series
Table 2. Special Function Registers - Functional Blocks
Block
Symbol
Name
Address
Contents
after Reset
CPU
ACC
B
DPH
DPL
PSW
SP
Accumulator
B-Register
Data Pointer, High Byte
Data Pointer, Low Byte
Program Status Word Register
Stack Pointer
E0H 1)
00H
F0H 1)
00H
83H
00H
82H
00H
D0H 1)
00H
81H
07H
Interrupt System IE
IP
Interrupt Enable Register
Interrupt Priority Register
A8H 1)
B8H 1)
0X000000B 2)
XX000000B 2)
Ports
P0
Port 0
P1
Port 1
P2
Port 2
P3
Port 3
80H 1)
90H 1)
A0H 1)
B0H 1)
FFH
FFH
FFH
FFH
Serial Channels
PCON 3)
SBUF
SCON
Power Control Register
Serial Channel Buffer Reg.
Serial Channel 0 Control Reg.
87H
99H
98H 1)
0XXX0000B 2)
XXH 2)
00H
Timer 0/ Timer 1
TCON
TH0
TH1
TL0
TL1
TMOD
Timer 0/1 Control Register
Timer 0, High Byte
Timer 1, High Byte
Timer 0, Low Byte
Timer 1, Low Byte
Timer Mode Register
88H 1)
00H
8CH
00H
8DH
00H
8AH
00H
8BH
00H
89H
00H
Timer 2
T2CON
T2MOD
RC2H
RC2L
TH2
TL2
AUXR0
Timer 2 Control Register
Timer 2 Mode Register
Timer 2 Reload Capture Reg., High Byte
Timer 2 Reload Capture Reg., Low Byte
Timer 2, High Byte
Timer 2, Low Byte
Aux. Register 0
C8H 1)
C9H
CBH
CAH
CDH
CCH
8EH
00H
00H
00H
00H
00H
00H
XXXXXXX0B 2)
Power Saving PCON 3)
Modes
Power Control Register
87H
0XXX0000B 2)
1) Bit-addressable Special Function register
2) X means that the value is indeterminate and the location is reserved
3) This special function register is listed repeatedly since some bit of it also belong to other functional blocks
Table 3. Contents of SFRs, SFRs in Numeric Order
Address
Register
Bit 7
6
5
4
3
2
1
0
80H
P0
Jan. 2003 Ver 1.0
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