參數(shù)資料
型號: SDA 5252
廠商: SIEMENS AG
英文描述: TVTEXT 8-Bit Microcontroller(ROM-Versions )(TV視頻的8位微控制器(含ROM 型 ))
中文描述: TVTEXT 8位微控制器(ROM的版本)(電視視頻的8位微控制器(含光盤型))
文件頁數(shù): 83/143頁
文件大?。?/td> 1050K
代理商: SDA 5252
SDA 525x
Semiconductor Group
83
1998-04-08
Timer/Counter Mode Register
Timer 0/1 Mode Register
Default after reset: 00
H
(MSB)
GATE
TMOD
SFR-Address 89
H
(LSB)
M0
C/T
M1
M0
GATE
C/T
M1
GATE
Gating control when set. Timer/counter “x” is enabled only
while “INTx” pin is high and “TRx” control bit is set. When
cleared, timer “x” is enabled, whenever “TRx” control bit is set.
C/T
Timer or counter selector. Cleared for timer operation (input
from internal system clock). Set for Counter operation (input
from “Tx” input pin).
Table 21
M1
0
0
M0
0
1
Operating Mode
SAB 8048 timer: “TLx” serves as five-bit prescaler.
16-bit timer/counter: “THx” and “TLx” are cascaded, there is no
prescaler.
8-bit auto-reload timer/counter: “THx” holds a value which is to be
reloaded into “TLx” each time it overflows.
(Timer 0) TL0 is an eight-bit timer/counter controlled by the standard
timer 0 control bits; TH0 is an eight-bit timer only controlled
by timer 1 control bits.
(Timer 1) timer/counter 1 is stopped.
1
1
0
1
Timer 1
Timer 0
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