ADUC812 Analog Devices, ADUC812 Datasheet - Page 30

• Manufacturer Part Number: ADUC812
• Description: Precision Analog Microcontroller: 1.3MIPS 8052 MCU + 8kB Flash + 8-Ch 12-Bit ADC + Dual 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC812

• Mcu Core: 8052
• Mcu Speed (mips): 1.3
• Sram (bytes): 256Bytes
• Gpio Pins: 34
• Adc # Channels: 8

ADuC812
User configuration and control of all Timer operating modes is achieved via three SFRs:
TMOD, TCON
T2CON
TMOD
SFR Address
Power-On Default Value
Bit Addressable
Bit
7
6
5
4
3
2
1
0
G
a
e t
Name
Gate
C/T
M1
M0
Gate
C/T
M1
M0
C
T /
Control and configuration for Timer 2.
Control and configuration for Timers 0 and 1.
Timer/Counter 0 and
1 Mode Register
89H
00H
No
Timer 1 Gating Control.
Timer 0 Gating Control.
Description
Set by software to enable Timer/Counter 1 only while INT1 pin is high and TR1 control bit is set.
Cleared by software to enable Timer 1 whenever TR1 control bit is set.
Timer 1 Timer or Counter Select Bit.
Set by software to select counter operation (input from T1 pin).
Cleared by software to select timer operation (input from internal system clock).
Timer 1 Mode Select Bit 1 (used with M0 Bit).
Timer 1 Mode Select Bit 0.
M1
0
0
1
1
Set by software to enable Timer/Counter 0 only while INT0 pin is high and TR0 control bit is set.
Cleared by software to enable Timer 0 whenever TR0 control bit is set.
Timer 0 Timer or Counter Select Bit.
Set by software to select counter operation (input from T0 pin).
Cleared by software to select timer operation (input from internal system clock).
Timer 0 Mode Select Bit 1.
Timer 0 Mode Select Bit 0.
M1
0
0
1
1
M
1
Table XV. TMOD SFR Bit Designations
M0
0
1
0
1
M0
0
1
0
1
M
0
TH1 operates as an 8-bit timer/counter. TL1 serves as 5-bit prescaler.
16-Bit Timer/Counter. TH1 and TL1 are cascaded; there is no prescaler.
8-Bit Autoreload Timer/Counter. TH1 holds a value that is to be
reloaded into TL1 each time it overflows.
Timer/Counter 1 Stopped.
TH0 operates as an 8-bit timer/counter. TL0 serves as 5-bit prescaler.
16-Bit Timer/Counter. TH0 and TL0 are cascaded; there is no prescaler.
8-Bit Autoreload Timer/Counter. TH0 holds a value that is to be
reloaded into TL0 each time it overflows.
TL0 is an 8-bit timer/counter controlled by the standard timer 0 control
bits. TH0 is an 8-bit timer only, controlled by Timer 1 control bits.
–30–
G
a
e t
C
T /
M
1
M
0
REV. E