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參數(shù)資料
| 型號(hào)： | ST6389 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| 中文描述： | 8位微控制器對(duì)屏幕，電視調(diào)諧顯示器 |
| 文件頁(yè)數(shù)： | 34/82頁(yè) |
| 文件大?。?/td> | 718K |
| 代理商： | ST6389 |
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ST6380, ST6381, ST6382, ST6383, ST6388, ST6389
TIMERS
(Cont’d)
4.2.2 Timer Status Control Registers (TSCR)
Timers 1 and 2
Address: D4h (Timer 1), DCh (Timer 2) - Read/
Write
Reset Value: 00h
TMZ
. Low-to-high transition indicates that the tim-
er count register has decremented to zero. This bit
must be cleared by user software before to start
with a new count.
ETI
. This bit, when set, enables the timer interrupt
(vector #3 for Timer 1, vector #2 for Timer 2 re-
quest). If ETI=0 the timer interrupt is disabled. If
ETI= 1 and TMZ= 1 an interrupt request is gener-
ated.
D5
. This is the timers enable bit D5. It must be
cleared to 0 together with a set to 1 of bit D4 to en-
able Timer 1 and Timer 2 functions. It is not imple-
mented on registers TSCR2.
D4
. This is the timers enable bit D4. This bit must
be set to 1 together with a clear to 0 of bit D5 to en-
able all Timers (Timer 1 and 2) functions. It is not
implemented on registers TSCR2.
PSI
. Used to initialize the prescaler and inhibit its
counting while PSI = 0 the prescaler is set to 7Fh
and the counter is inhibited. When PSI = 1 the
prescaler is enabled to count downwards. As long
as PSI= 0 both counter and prescaler are not run-
ning.
PS2-PS0
. These bits select the division ratio of the
prescaler register. (see
Table 12
)
The TSCR1 and TSCR2 registers are cleared on
reset. The correct D4-D5 combination must be
written in TSCR1 by user's software to enable the
operation of Timer 1 and 2.
Table 12. Prescaler Division Factors
4.2.3 Timer Counter Registers (TCR)
Timer Counter 1 and 2
Address: D3h (Timer Counter 1), DBh (Timer
Counter 2) - Read/Write
Reset Value: FFh
Bit 7-0 =
D7-D0
:
Counter Bits.
4.2.4 Timer Prescaler Registers (PSCR)
Timer Prescalers 1 and 2
Address: D2h (Timer Prescaler 1), DAh (Timer
Prescaler 2) - Read/Write
Reset Value: 7Fh
Bit 7 =
D7
: Always read as "0".
Bit 6-0 =
D6-D0
: Prescaler Bits.
7
0
TMZ
ETI
D5
D4
PSI
PS2
PS1
PS0
D5
0
0
1
D4
0
1
X
Timers
Disabled
Enabled
Reserved
PS2
0
0
0
0
1
1
1
1
PS1
0
0
1
1
0
0
1
1
PS0
0
1
0
1
0
1
0
1
Divided By
1
2
4
8
16
32
64
128
7
0
D7
D6
D5
D4
D3
D2
D1
D0
7
0
D7
D6
D5
D4
D3
D2
D1
D0
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| ST63RT1 | 8-BIT MICROCONTROLLER |
| ST6400C1003 | CONTROLLER CHRONOTHERM |
| ST650C20L1 | THYRISTOR 1557A |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST6389B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6389B4 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6391 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6391B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6392 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
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