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參數(shù)資料
| 型號(hào)： | W79E201A16PN |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | ROHS COMPLIANT, PLASTIC, LCC-44 |
| 文件頁(yè)數(shù)： | 43/87頁(yè) |
| 文件大小： | 818K |
| 代理商： | W79E201A16PN |
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W79E201
Publication Release Date: December 16, 2004
- 43 -
Revision A2
timers will increment at the rate of 1/4 clock speed. This will straight-away increase the counting
speed three times. This selection is done by the T0M and T1M bits in CKCON SFR. A reset sets these
bits to 0, and the timers then operate in the standard 8051 mode. The user should set these bits to 1 if
the timers are to operate in turbo mode.
Mode 0
In Mode 0, the timer/counters act as a 8 bit counter with a 5 bit, divide by 32 pre-scale. In this mode
we have a 13 bit timer/counter. The 13 bit counter consists of 8 bits of THx and 5 lower bits of TLx.
The upper 3 bits of TLx are ignored.
The negative edge of the clock is increments the count in the TLx register. When the fifth bit in TLx
moves from 1 to 0, then the count in the THx register is incremented. When the count in THx is
moving from FFh to 00h, then the overflow flag TFx in TCON SFR is set. The counted input is enabled
only if TRx is set and either GATE = 0 or
INTx
= 1. When
cycles, and if
T
C/
is set to 1, then it will count 1 to 0 transitions on T0 (P3.4) for timer 0 and T1 (P3.5)
for timer 1. When the 13 bit count reaches 1FFFh the next count will cause it to roll-over to 0000h. The
timer overflow flag TFx of the relevant timer is set and if enabled an interrupts will occur. Note that
when used as a timer, the time-base may be either clock cycles/12 or clock cycles/4 as selected by
the bits TxM of the CKCON SFR.
T
C/
is set to 0, then it will count clock
1/4
1/12
C/T = TMOD.2
(C/T = TMOD.6)
T0M = CKCON.3
(T1M = CKCON.4)
M1,M0 = TMOD.1,TMOD.0
(M1,M0 = TMOD.5,TMOD.4)
Interrupt
T0 = P3.4
(T1 = P3.5)
TH0
(TH1)
TL0
(TL1)
TF0
(TF1)
TR0 = TCON.4
(TR1 = TCON.6)
GATE = TMOD.3
(GATE = TMOD.7)
INT0 = P3.2
(INT1 = P3.3)
7
0
TFx
4
7
0
Timer 1 functions are shown in brackets
1
00
0
0
1
01
osc
Timer/Counter Mode 0 & Mode 1
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| W79E2051 | 制造商:WINBOND 制造商全稱:Winbond 功能描述: |
| W79E2051AKG | 制造商:Winbond Electronics Corp 功能描述:8 BIT MCU 制造商:Nuvoton Technology Corp 功能描述:IC MCU 2KB FLASH 20PDIP |
| W79E2051ASG | 制造商:Nuvoton Technology Corp 功能描述:IC MCU 2KB FLASH 20SOP |
| W79E2051RAKG | 制造商:Nuvoton Technology Corp 功能描述:IC MCU 2KB FLASH 20PDIP |
| W79E2051RARG | 制造商:Nuvoton Technology Corp 功能描述:IC MCU 2KB FLASH 20SSOP |
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