參數(shù)資料
型號(hào): AT80C31X2-SLSUM
廠商: Atmel
文件頁(yè)數(shù): 32/42頁(yè)
文件大?。?/td> 0K
描述: IC 8031 MCU ROMLESS 44PLCC
標(biāo)準(zhǔn)包裝: 972
系列: 80C
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
輸入/輸出數(shù): 32
程序存儲(chǔ)器類型: ROMless
RAM 容量: 128 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: 44-LCC(J 形引線)
包裝: 管件
38
4428E–8051–02/08
AT/TS80C31X2
14.5.6
External Clock Drive Waveforms
Figure 14-10. External Clock Drive Waveforms
14.5.7
AC Testing Input/Output Waveforms
Figure 14-11. AC Testing Input/Output Waveforms
AC inputs during testing are driven at VCC - 0.5 for a logic “1” and 0.45V for a logic “0”. Timing
measurement are made at VIH min for a logic “1” and VIL max for a logic “0”.
14.5.8
Float Waveforms
Figure 14-12. Float Waveforms
For timing purposes a port pin is no longer floating when a 100 mV change from load voltage
occurs and begins to float when a 100 mV change from the loaded VOH/VOL level occurs. IOL/IOH
≥ ± 20mA.
14.5.9
Clock Waveforms
Valid in normal clock mode. In X2 mode XTAL2 signal must be changed to XTAL2 divided by
two.
V
CC-0.5 V
0.45 V
0.7V
CC
0.2V
CC-0.1 V
T
CHCL
T
CLCX
T
CLCL
TCLCH
T
CHCX
0.45 V
V
CC-0.5 V
0.2V
CC+0.9
0.2V
CC-0.1
INPUT/OUTPUT
VOL+0.1 V
V
OH-0.1 V
FLOAT
VLOAD
VLOAD+0.1 V
V
LOAD-0.1 V
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