83C749 Philips Semiconductors, 83C749 Datasheet - Page 9

• Manufacturer Part Number: 83C749
• Description: 80C51 8-bit microcontroller family 2K/64 OTP/ROM/ 5 channel 8-bit A/D/ PWM/ low pin count
• Manufacturer: Philips Semiconductors

*
# SFRs are modified from or added to the 80C51 SFRs.
Philips Semiconductors
may always be used as digital inputs. Unselected analog inputs will
be floating and may not be used as digital outputs.
The A/D reference inputs on the 8XC749 are tied together with the
analog supply pins AV
voltage on the A/D cannot be varied separately from the analog
Table 2.
1998 Apr 23
ACC*
ADAT#
ADCON#
B*
DPTR:
IE*#
P0*#
P1*#
P3*
PCON#
PSW*
PWCM#
PWENA#
PWMP#
RTL#
RTH#
SP
TL#
TH#
TICON*#
TCON*#
SYMBOL
DPL
DPH
80C51 8-bit microcontroller family
2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count
SFRs are bit addressable.
Accumulator
A/D result
A/D control
B register
Data pointer
Data pointer low
Data pointer high
Interrupt enable
Port 0
Port 1
Port 3
Power control
Program status word
PWM compare
PWM enable
PWM prescaler
Timer low reload
Timer high reload
Stack pointer
Timer low
Timer high
Timer I control
Timer control
8XC749 Special Function Registers
(2 bytes)
DESCRIPTION
CC
and AV
SS
. This means that the reference
ADDRESS
DIRECT
D8H/RD
ADH
E0H
A0H
F0H
B0H
D0H
8EH
FEH
8FH
8BH
8DH
8AH
8CH
84H
82H
83H
80H
90H
87H
81H
88H
WR
MSB
GATE
EA
CY
DF
E7
F7
AF
T0
B7
D7
8F
97
–
–
–
–
–
–
–
BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION
INT1
EAD
C/T
AE
D6
AC
DE
E6
F6
B6
8E
96
–
–
–
–
–
–
–
ENADC
CLRTI
INT0
ETI
9
AD
DD
E5
B5
D5
8D
TF
F5
95
F0
–
–
–
–
0
supply pins. AV
connected to a supply voltage between 4.5V and 5.5V. A/D
measurements may be made in the range of 4.5V to 5.5V.
Increasing the voltage on the A/D ground reference above 0V or
reducing the voltage on the positive A/D reference below 4.5V is not
permitted.
PWM0
TIRUN
TIRUN
ADC4
ADCI
RS1
AC
DC
E4
B4
D4
8C
TR
F4
84
94
—
–
–
EPWM
SS
ADCS
ADC3
RS0
IE0
AB
DB
E3
F3
B3
D3
8B
83
93
–
–
–
–
–
must be connected to 0V and AV
AADR2
ADC2
EX1
AA
OV
DA
IT0
E2
F2
B2
D2
8A
82
92
–
–
–
–
–
AADR1
ADC1
83C749/87C749
ET0
PD
IE1
E1
A9
B1
D1
D9
F1
81
91
89
–
–
–
–
–
Preliminary specification
AADR0
ADC0
PWE
EX0
IDL
LSB
IT1
E0
F0
A8
B0
D0
D8
80
90
88
P
–
–
–
CC
must be
00H
00H
C0H
00H
00H
00H
00H
xxx11111B
FFH
FFH
xxxx0000B
00H
xxxxxxxxB
FEH
00H
00H
00H
07H
00H
00H
0000xx00B
00H
RESET
VALUE