參數(shù)資料
型號(hào): SST89C58RC-40-C-QIF
廠商: Microchip Technology
文件頁(yè)數(shù): 38/88頁(yè)
文件大?。?/td> 0K
描述: IC MCU 8BIT FLASH 40WQFN
標(biāo)準(zhǔn)包裝: 81
系列: FlashFlex®
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: EBI/EMI,I²C,SMBus,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 32KB(32K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 2K x 8
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 40-WFQFN 裸露焊盤
包裝: 管件
2011 Silicon Storage Technology, Inc.
DS25100A
12/11
43
FlashFlex MCU
SST89C58RC
Data Sheet
A Microchip Technology Company
Programmable Clock-Out
A 50% duty cycle clock can be programmed to come out on P1.0. This pin, besides being a regular I/O
pin, has two alternate functions. It can be programmed:
1.
to input the external clock for Timer/Counter 2, or
2.
to output a 50% duty cycle clock ranging from 122 Hz to 8 MHz at a 16 MHz operating fre-
quency (61 Hz to 4 MHz in 12 clock mode).
To configure Timer/Counter 2 as a clock generator, bit
C/#T2 (in T2CON) must be cleared and bit T20E in T2MOD must be set. Bit TR2 (T2CON.2) also must
be set to start the timer.
The Clock-Out frequency depends on the oscillator frequency and the reload value of Timer 2 capture
registers (RCAP2H, RCAP2L) as shown in this equation:
Oscillator Frequency
n x (65536 - RCAP2H, RCAP2L)
n =2 (in 6 clock mode) or 4 (in 12 clock mode)
Where (RCAP2H, RCAP2L) = the contents of RCAP2H and RCAP2L taken as a 16-bit unsigned inte-
ger.
In the Clock-Out mode, Timer 2 roll-overs will not generate an interrupt. This is similar to when it is
used as a baud-rate generator. It is possible to use Timer 2 as a baud-rate generator and a clock gen-
erator simultaneously. Note, however, that the baud-rate and the Clock-Out frequency will not be the
same.
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