參數(shù)資料
型號(hào): AT89LP428-20PU
廠商: Atmel
文件頁數(shù): 91/149頁
文件大?。?/td> 0K
描述: MCU 8051 4K FLASH SPI 28PDIP
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 14
系列: 89LP
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 30
程序存儲(chǔ)器容量: 4KB(4K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 512 x 8
RAM 容量: 768 x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-DIP(0.300",7.62mm)
包裝: 管件
46
3654A–MICRO–8/09
AT89LP428/828
Table 11-3.
TMOD – Timer/Counter Mode Control Register
TMOD Address = 089H
Reset Value = 0000 0000B
Not Bit Addressable
GATE1
C/T1
T1M1
T1M0
GATE0
C/T0
T0M0
T0M1
Bit
765
43
210
Symbol
Function
GATE1
Timer 1 Gating Control. When set. Timer/Counter 1 is enabled only while INT1 pin is high and TR1 control pin is set.
When cleared, Timer 1 is enabled whenever TR1 control bit isset.
C/T1
Timer or Counter Selector 1. Cleared for Timer operation (input from internal system clock). Set for Counter operation
(input from T1 input pin). C/T1 must be zero when using Timer 1 in PWM mode.
T1M1
T1M0
Mode
T1M1
T1M0
Timer 1 Operation
000
Variable 9 – 16-bit Timer mode. 8-bit Timer/Counter TH1 with TL1 as 1- to 8-bit prescaler.
101
16-bit Auto-reload mode. TH1 and TL1 are cascaded to form a 16-bit Timer/Counter that is
reloaded with RH1 and RL1 each time it overflows.
210
8-bit Auto-reload mode. 8-bit Timer/Counter TL1 is reloaded from TH1 each time it overflows.
311
Timer/Counter 1 is stopped
GATE0
Timer 0 Gating Control. When set. Timer/Counter 0 is enabled only while INT0 pin is high and TR0 control pin is set.
When cleared, Timer 0 is enabled whenever TR0 control bit isset.
C/T0
Timer or Counter Selector 0. Cleared for Timer operation (input from internal system clock). Set for Counter operation
(input from T0 input pin). C/T0 must be zero when using Timer 0 in PWM mode.
T0M1
T0M0
Mode
T0M1
T0M0
Timer 0 Operation
000
Variable 9 – 16-bit Timer Mode. 8-bit Timer/Counter TH0 with TL0 as 1- to 8-bit prescaler.
101
16-bit Auto-reload mode. TH0 and TL0 are cascaded to form a 16-bit Timer/Counter that is
reloaded with RH0 and RL0 each time it overflows.
210
8-bit Auto-reload mode. 8-bit Timer/Counter TL0 is reloaded from TH0 each time it overflows.
311
Split Timer Mode. 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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