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參數(shù)資料
| 型號： | ST6253BB6 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, EEPROM AND SPI |
| 中文描述： | 8位檢察官辦公室/存儲器與阿微控制器/ D轉(zhuǎn)換器，自動重加載定時器，EEPROM和的SPI |
| 文件頁數(shù)： | 40/75頁 |
| 文件大?。?/td> | 540K |
| 代理商： | ST6253BB6 |
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ST62T53B/T60B/T63B ST62E60B
TIMER
(Cont’d)
A write to the TCR register will predominate over
the 8-bit counter decrement to 00h function, i.e. ifa
write and a TCR register decrement to 00h occur
simultaneously, the write will take precedence,
and the TMZ bit is not set until the 8-bit counter
reaches 00h again. The values of the TCR and the
PSC registers can be read accurately at any time.
4.2.4 Timer Registers
Timer Status Control Register (TSCR)
Address: 0D4h
—
Read/Write
Bit 7 =
TMZ
: Timer Zero bit
A low-to-high transition indicates that the timer
count register has decrement to zero. This
must be cleared by user software before starting a
new count.
Bit 6 =
ETI
: Enable Timer Interrup
When set, enables the timer interrupt request
(vector #3). If ETI=0 the timer interrupt is disabled.
If ETI=1 and TMZ=1 an interrupt request is gener-
ated.
Bit 5 =
D5
: Reserved
Must be set to “1”.
Bit 4 =
D4
Do not care.
Bit 3 =
PSI
: Prescaler Initialize Bit
Used to initialize the prescaler and inhibit its count-
ing. When PSI=“0” the prescaler is set to 7Fh and
the counter is inhibited. When PSI=“1” the prescal-
er is enabled to count downwards. As long as
bit
PSI=“0” both counter and prescaler are not run-
ning.
Bit 2, 1, 0 =
PS2, PS1, PS0
: Prescaler Mux. Se-
lect.These bits select the division ratio of the pres-
caler register.
Table 14.Prescaler Division Factors
Timer Counter Register (TCR)
Address: 0D3h
—
Read/Write
Bit 7-0 =
D7-D0
: Counter Bits.
Prescaler Register PSC
Address: 0D2h
—
Read/Write
Bit 7 =
D7
: Always read as ”0”.
Bit 6-0 =
D6-D0
: Prescaler Bits.
7
0
TMZ
ETI
D5
D4
PSI
PS2
PS1
PS0
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
40
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST6253BB6/XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| ST6253BM1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, EEPROM AND SPI |
| ST6253BM1/XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| ST6253BM3 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, EEPROM AND SPI |
| ST6253BM3/XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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