参数资料
型号: SST89C58RC-40-I-TQJE
厂商: Microchip Technology
文件页数: 36/88页
文件大小: 0K
描述: IC MCU 8BIT FLASH 40TQFP
标准包装: 160
系列: FlashFlex®
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: EBI/EMI,I²C,SMBus,UART/USART
外围设备: 欠压检测/复位,POR,WDT
输入/输出数: 32
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-TQFP
包装: 托盘
2011 Silicon Storage Technology, Inc.
DS25100A
12/11
41
FlashFlex MCU
SST89C58RC
Data Sheet
A Microchip Technology Company
Timers/Counters
Timers
The device has three 16-bit registers that can be used as either timers or event counters. The three
timers/counters are denoted Timer 0 (T0), Timer 1 (T1), and Timer 2 (T2). Each is designated a pair of
8-bit registers in the SFRs. The pair consists of a most significant (high) byte and least significant (low)
byte. The respective registers are TL0, TH0, TL1, TH1, TL2, and TH2.
Timer Set-up
Refer to Table 7 for TMOD, TCON, and T2CON registers regarding timers T0, T1, and T2. The follow-
ing tables provide TMOD values to be used to set up Timers T0, T1, and T2.
Except for the baud rate generator mode, the values given for T2CON do not include the setting of the
TR2 bit. Therefore, bit TR2 must be set separately to turn the timer on.
Table 15:Timer/Counter 0
Mode
Function
TMOD
Internal
Control1
1. The Timer is turned ON/OFF by setting/clearing
bit TR0 in the software.
External
Control2
2. The Timer is turned ON/OFF by the 1 to 0 transition
on INT0# (P3.2) when TR0 = 1 (hardware control).
Used as Timer
0
13-bit Timer
00H
08H
1
16-bit Timer
01H
09H
2
8-bit Auto-Reload
02H
0AH
3
Two 8-bit Timers
03H
0BH
Used as Counter
0
13-bit Timer
04H
0CH
1
16-bit Timer
05H
0DH
2
8-bit Auto-Reload
06H
0EH
3
Two 8-bit Timers
07H
0FH
T0-0.0 25100
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