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| 型号： | USB-EA-CONVZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 48/68页 |
| 文件大小： | 0K |
| 描述： | SUPPORT BOARD ADUC8XX |
| 标准包装： | 1 |
| 类型： | 仿真器 |
| 适用于相关产品： | ADuC8xx |
| 所含物品： | 模块 |
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REV. B
ADuC824
–52–
User configuration and control of all Timer operating modes is achieved via three SFRs namely:
TMOD, TCON:
Control and configuration for Timers 0 and 1.
T2CON:
Control and configuration for Timer 2.
TMOD
Timer/Counter 0 and 1 Mode Register
SFR Address
89H
Power-On Default Value
00H
Bit Addressable
No
e
t
a
G/
C T
1
M0
Me
t
a
G/
C T
1
M0
M
Table XXIII. TMOD SFR Bit Designations
Bit
Name
Description
7
Gate
Timer 1 Gating Control
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.
6C/
T
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).
5
M1
Timer 1 Mode Select Bit 1 (Used with M0 Bit)
4
M0
Timer 1 Mode Select Bit 0
M1
M0
0
TH1 operates as an 8-bit timer/counter. TL1 serves as 5-bit prescaler.
0
1
16-Bit Timer/Counter. TH1 and TL1 are cascaded; there is no prescaler.
1
0
8-Bit Auto-Reload Timer/Counter. TH1 holds a value which is to be
reloaded into TL1 each time it overflows.
1
Timer/Counter 1 Stopped.
3
Gate
Timer 0 Gating Control
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.
2C/
T
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).
1
M1
Timer 0 Mode Select Bit 1
0
M0
Timer 0 Mode Select Bit 0
M1
M0
0
TH0 operates as an 8-bit timer/counter. TL0 serves as 5-bit prescaler.
0
1
16-Bit Timer/Counter. TH0 and TL0 are cascaded; there is no prescaler.
1
0
8-Bit Auto-Reload Timer/Counter. TH0 holds a value which is to be
reloaded into TL0 each time it overflows.
1
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.
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