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參數資料
型號: 73S1210F-44IMR/F/P
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC44
封裝: LEAD FREE, QFN-44
文件頁數: 67/126頁
文件大小: 1231K
代理商: 73S1210F-44IMR/F/P
DS_1210F_001
73S1210F Data Sheet
Rev. 1.4
45
1.7.7
Timers and Counters
The 80515 has two 16-bit timer/counter registers: Timer 0 and Timer 1. These registers can be
configured for counter or timer operations.
In timer mode, the register is incremented every machine cycle, meaning that it counts up after every 12
periods of the MPU clock signal.
In counter mode, the register is incremented when the falling edge is observed at the corresponding input
signal T0 or T1 (T0 and T1 are the timer gating inputs derived from USR[0:7] pins, see the User (USR)
Ports section). Since it takes 2 machine cycles to recognize a 1-to-0 event, the maximum input count
rate is 1/2 of the oscillator frequency. There are no restrictions on the duty cycle, however to ensure
proper recognition of 0 or 1 state, an input should be stable for at least 1 machine cycle.
Four operating modes can be selected for Timer 0 and Timer 1. Two Special Function Registers (TMOD
and TCON) are used to select the appropriate mode.
The Timer 0 load registers are designated as TL0 and TH0 and the Timer 1 load registers are designated
as TL1 and TH1.
Timer/Counter Mode Control Register (TMOD): 0x89
0x00
Table 40: The TMOD Register
MSB
LSB
GATE
C/T
M1
M0
GATE
C/T
M1
M0
Timer 1
Timer 0
Bits TR1 and TR0 in the TCON register start their associated timers when set.
Bit
Symbol
Function
TMOD.7
TMOD.3
Gate
If set, enables external gate control (USR pin(s) connected to T0 or T1 for
Counter 0 or 1, respectively). When T0 or T1 is high, and TRx bit is set (see
the TCON register), a counter is incremented every falling edge on T0 or T1
input pin. If not set, the TRx bit controls the corresponding timer.
TMOD.6
TMOD.2
C/T
Selects Timer or Counter operation. When set to 1, the counter operation is
performed based on the falling edge of T0 or T1. When cleared to 0, the
corresponding register will function as a timer.
TMOD.5
TMOD.1
M1
Selects the mode for Timer/Counter 0 or Timer/Counter 1, as shown in the
TMOD description.
TMOD.4
TMOD.0
M0
Selects the mode for Timer/Counter 0 or Timer/Counter 1, as shown in the
TMOD description.
Table 41: Timers/Counters Mode Description
M1
M0
Mode
Function
0
Mode 0
13-bit Counter/Timer.
0
1
Mode 1
16-bit Counter/Timer.
1
0
Mode 2
8-bit auto-reload Counter/Timer.
1
Mode 3
If Timer 1 M1 and M0 bits are set to '1', Timer 1 stops. If Timer 0 M1
and M0 bits are set to '1', Timer 0 acts as two independent 8-bit
Timer/Counters.
相關PDF資料
PDF描述
73S1210F-68IMR/F/P 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68
73S1210F-68IM/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68
73S1210F-44IM/F/P 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC44
73S1210F-68IMR/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68
73S1210F-44IM/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC44
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73S1210F-44M/F/PD 制造商:Maxim Integrated Products 功能描述:SCR+PIN PAD/SRL INTRFC/PWR MGT-PROG - Rail/Tube
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73S1210F-68IM/F/P 功能描述:IC SMART CARD READER PROG 68-QFN RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:73S12xx 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C,智能卡,UART/USART,USB 外圍設備:LED,POR,WDT 輸入/輸出數:9 程序存儲器容量:64KB(64K x 8) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數據轉換器:- 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件
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