Rainbow Electronics W78C54 - Manual (Page 7)

W78C54
Publication Release Date: December 1997
- 7 - Revision A2
DESCRIPTIONS OF THE SPECIAL FUNCTION REGISTERS (SFRS)
SYM. DEFINITION ADDR. MSB BIT ADDRESS, SYMBOL LSB RESET
B B register F0H (F7) (F6) (F5) (F4) (F3) (F2) (F1) (F0) 00000000B
ACC Accumulator E0H (E7) (E6) (E5) (E4) (E3) (E2) (E1) (E0) 00000000B
P4* Port 4 D8H - - - - (DB)
INT2
(DA)
INT3
(D9) (D8) xxxx0000B
PSW Program status word D0H (D7)
CY
(D6)
AC
(D5)
F0
(D4)
RS1
(D3)
RS0
(D2)
OV
(D1)
-
(D0)
P
00000000B
TH2 T2 reg. high CDH 00000000B
TL2 T2 reg. low CCH 00000000B
RCAP2H T2 capture high CBH 00000000B
RCAP2L T2 capture low CAH 00000000B
T2CON Timer 2 control C8H (CF)
TF2
(CE)
EXF2
(CD)
RCLK
(CC)
TCLK
(CB)
EXEN2
(CA)
TR2
(C9)
C/T2
(C8)
CP/RL2
00000000B
XICON* External interrupt
control C0H (C7)
PX3
(C6)
EX3
(C5)
IE3
(C4)
IT3
(C3)
PX2
(C2)
EX2
(C1)
IE2
(C0)
IT2
00000000B
IP Interrupt priority B8H - - PT2 PS PT1 PX1 PT0 PX0 xx000000B
P3 Port 3 B0H (B7)
RD
(B6)
WR
(B5)
T1
(B4)
T0
(B3)
INT1
(B2)
INT0
(B1)
TXD
(B0)
RXD
11111111B
IE Interrupt enable A8H (AF)
EA
(AE)
-
(AD)
ET2
(AC)
ES
(AB)
ET1
(AA)
EX1
(A9)
ET0
(A8)
EX0
00000000B
P2 Port 2 A0H (A7)
A15
(A6)
A14
(A5)
A13
(A4)
A12
(A3)
A11
(A2)
A10
(A1)
A9
(A0)
A8
11111111B
SBUF Serial buffer 99H xxxxxxxxB
SCON* Serial control 98H (9F)
SM0/FE
(9E)
SM1
(9D)
SM2
(9C)
REN
(9B)
TB8
(9A)
RB8
(99)
TI
(98)
RI
00000000B
P1* Port 1 90H (97) (96) (95) (94) (93) (92) (91)
T2EX
(90)
T2
11111111B
AUXR* Auxiliary 8EH - - - - - - - AO xxxxxxx0B
TH1 Timer high 1 8DH 00000000B
TH0 Timer high 0 8CH 00000000B
TL1 Timer low 1 8BH 00000000B
TL0 Timer low 0 8AH 00000000B
TMOD Timer mode 89H GATE C/T M1 M0 GATE C/T M1 M0 00000000B
TCON Timer control 88H (8F)
TF1
(8E)
TR1
(8D)
TF0
(8C)
TR0
(8B)
IE1
(8A)
IT1
(89)
IE0
(88)
IT0
00000000B
PCON* Power control 87H SMOD SMOD0 - POF+ GF1 GF0 PD IDL 00xxxx00B
DPH Data pointer high 83H 00000000B
DPL Data pointer low 82H 00000000B
SP Stack pointer 81H 00000111B
P0 Port 0 80H (87) (86) (85) (84) (83) (82) (81) (80) 11111111B