參數(shù)資料
型號(hào): AT80251G2D-SLSUL
廠(chǎng)商: Atmel
文件頁(yè)數(shù): 40/77頁(yè)
文件大?。?/td> 0K
描述: IC 8051 MCU ROMLESS 44PLCC
標(biāo)準(zhǔn)包裝: 972
系列: 8x251
核心處理器: C251
芯體尺寸: 8/16-位
速度: 16MHz
連通性: EBI/EMI,I²C,Microwire,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器類(lèi)型: ROMless
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 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(xiàn))
包裝: 管件
45
AT/TSC8x251G2D
4135F–8051–11/06
AC Characteristics - Commercial & Industrial
AC Characteristics - External Bus Cycles
Definition of Symbols
Table 38.
External Bus Cycles Timing Symbol Definitions
Timings
Test conditions: capacitive load on all pins = 50 pF.
Table 39 and Table 40 list the AC timing parameters for the TSC80251G2D derivatives
with no wait states. External wait states can be added by extending PSEN#/RD#/WR#
and or by extending ALE. In these tables, Note 2 marks parameters affected by one ALE
wait state, and Note 3 marks parameters affected by PSEN#/RD#/WR# wait states.
Figure 8 to Figure 13 show the bus cycles with the timing parameters.
Signals
Conditions
A
Address
H
High
D
Data In
L
Low
L
ALE
V
Valid
Q
Data Out
X
No Longer Valid
R
RD#/PSEN#
Z
Floating
WWR#
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