參數(shù)資料
型號: T89C51AC2-RLTIM
廠商: Atmel
文件頁數(shù): 82/121頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 32K 44VQFP
標(biāo)準(zhǔn)包裝: 160
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(shè)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-LQFP
包裝: 托盤
63
A/T89C51AC2
4127H–8051–02/08
Table 40. TMOD Register
TMOD (S:89h)
Timer/Counter Mode Control Register
Notes: 1. Reloaded from TH1 at overflow.
2. Reloaded from TH0 at overflow.
Reset Value = 0000 0000b
7
6
5
4
3
2
1
0
GATE1
C/T1#
M11
M01
GATE0
C/T0#
M10
M00
Bit
Number
Bit
Mnemonic Description
7
GATE1
Timer 1 Gating Control Bit
Clear to enable Timer 1 whenever TR1 bit is set.
Set to enable Timer 1 only while INT1# pin is high and TR1 bit is set.
6
C/T1#
Timer 1 Counter/Timer Select Bit
Clear for Timer operation: Timer 1 counts the divided-down system clock.
Set for Counter operation: Timer 1 counts negative transitions on external pin T1.
5
M11
Timer 1 Mode Select Bits
M11 M01
Operating mode
0
Mode 0: 8-bit Timer/Counter (TH1) with 5-bit prescaler (TL1).
0
1
Mode 1: 16-bit Timer/Counter.
1
0
Mode 2: 8-bit auto-reload Timer/Counter (TL1)(1)
1
Mode 3: Timer 1 halted. Retains count
4
M01
3
GATE0
Timer 0 Gating Control Bit
Clear to enable Timer 0 whenever TR0 bit is set.
Set to enable Timer/Counter 0 only while INT0# pin is high and TR0 bit is set.
2
C/T0#
Timer 0 Counter/Timer Select Bit
Clear for Timer operation: Timer 0 counts the divided-down system clock.
Set for Counter operation: Timer 0 counts negative transitions on external pin T0.
1
M10
Timer 0 Mode Select Bit
M10 M00
Operating mode
0
Mode 0: 8-bit Timer/Counter (TH0) with 5-bit prescaler (TL0).
0
1
Mode 1: 16-bit Timer/Counter.
1
0
Mode 2: 8-bit auto-reload Timer/Counter (TL0)(2)
1
Mode 3: TL0 is an 8-bit Timer/Counter
TH0 is an 8-bit Timer using Timer 1’s TR0 and TF0 bits.
0
M00
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