參數(shù)資料
型號(hào): TS87C54X2-MIA
廠商: Atmel
文件頁(yè)數(shù): 9/62頁(yè)
文件大?。?/td> 0K
描述: IC MCU 8BIT 16K OTP 40MHZ 40-DIP
標(biāo)準(zhǔn)包裝: 9
系列: 87C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40/20MHz
連通性: UART/USART
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 16KB(16K x 8)
程序存儲(chǔ)器類型: OTP
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
17
4431E–8051–04/06
AT/TS8xC54/8X2
Table 8-1.
T2CON Register
T2CON - Timer 2 Control Register (C8h)
Reset Value = 0000 0000b
Bit addressable
7
6
5
4
3
2
1
0
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
C/T2#
CP/RL2#
Bit
Number
Bit
Mnemonic
Description
7TF2
Timer 2 overflow Flag
Must be cleared by software.
Set by hardware on timer 2 overflow, if RCLK = 0 and TCLK = 0.
6
EXF2
Timer 2 External Flag
Set when a capture or a reload is caused by a negative transition on T2EX pin if EXEN2=1.
When set, causes the CPU to vector to timer 2 interrupt routine when timer 2 interrupt is
enabled.
Must be cleared by software. EXF2 doesn’t cause an interrupt in Up/down counter mode
(DCEN = 1)
5
RCLK
Receive Clock bit
Clear to use timer 1 overflow as receive clock for serial port in mode 1 or 3.
Set to use timer 2 overflow as receive clock for serial port in mode 1 or 3.
4TCLK
Transmit Clock bit
Clear to use timer 1 overflow as transmit clock for serial port in mode 1 or 3.
Set to use timer 2 overflow as transmit clock for serial port in mode 1 or 3.
3
EXEN2
Timer 2 External Enable bit
Clear to ignore events on T2EX pin for timer 2 operation.
Set to cause a capture or reload when a negative transition on T2EX pin is detected, if timer
2 is not used to clock the serial port.
2TR2
Timer 2 Run control bit
Clear to turn off timer 2.
Set to turn on timer 2.
1C/T2#
Timer/Counter 2 select bit
Clear for timer operation (input from internal clock system: F
OSC).
Set for counter operation (input from T2 input pin, falling edge trigger). Must be 0 for clock
out mode.
0CP/RL2#
Timer 2 Capture/Reload bit
If RCLK=1 or TCLK=1, CP/RL2# is ignored and timer is forced to auto-reload on timer 2
overflow.
Clear to auto-reload on timer 2 overflows or negative transitions on T2EX pin if EXEN2=1.
Set to capture on negative transitions on T2EX pin if EXEN2=1.
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