參數(shù)資料
型號(hào): SST89E52RC-33-C-NJE
廠商: Microchip Technology
文件頁數(shù): 28/71頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 9KB FLASH 44PLCC
標(biāo)準(zhǔn)包裝: 26
系列: FlashFlex®
核心處理器: 8051
芯體尺寸: 8-位
速度: 33MHz
連通性: EBI/EMI,UART/USART
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
2011 Silicon Storage Technology, Inc.
DS25088A
10/11
34
FlashFlex MCU
SST89E52RC / SST89E54RC
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 8 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 14: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 25008
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