參數(shù)資料
型號: T89C51AC2-SLSIM
廠商: Atmel
文件頁數(shù): 76/121頁
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
標準包裝: 27
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: UART/USART
外圍設備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
58
A/T89C51AC2
4127H–8051–02/08
Mode 0 (13-bit Timer)
Mode 0 configures Timer 0 as an 13-bit Timer which is set up as an 8-bit Timer (TH0
register) with a modulo 32 prescaler implemented with the lower five bits of TL0 register
(see Figure 31). The upper three bits of TL0 register are indeterminate and should be
ignored. Prescaler overflow increments TH0 register.
Figure 31. Timer/Counter x (x = 0 or 1) in Mode 0
Mode 1 (16-bit Timer)
Mode 1 configures Timer 0 as a 16-bit Timer with TH0 and TL0 registers connected in
cascade (see Figure 32). The selected input increments TL0 register.
Figure 32. Timer/Counter x (x = 0 or 1) in Mode 1
FTx
CLOCK
TRx
TCON reg
TFx
TCON reg
0
1
GATEx
TMOD reg
÷
6
Overflow
Timer x
Interrupt
Request
C/Tx#
TMOD reg
TLx
(5 bits)
THx
(8 bits)
INTx#
Tx
See the “Clock” section
TRx
TCON reg
TFx
TCON reg
0
1
GATEx
TMOD reg
Overflow
Timer x
Interrupt
Request
C/Tx#
TMOD reg
TLx
(8 bits)
THx
(8 bits)
INTx#
Tx
FTx
CLOCK
÷
6
See the “Clock” section
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