at89c51re2-slsem ATMEL Corporation, at89c51re2-slsem Datasheet - Page 156

• Manufacturer Part Number: at89c51re2-slsem
• Description: At89c51re2 8-bit Flash Microcontroller
• Manufacturer: ATMEL Corporation

External Data Memory Write
Cycle
External Data Memory Read Cycle
Serial Port Timing - Shift
Register Mode
7663B–8051–03/07
PORT 0
PORT 2
PORT 0
PORT 2
PSEN
ALE
PSEN
ALE
WR
RD
OR SFR-P2
OR SFR-P2
ADDRESS
ADDRESS
Table 104. Symbol Description
Symbol
T
T
T
T
T
QVHX
XHQX
XHDX
XHDV
XLXL
A0-A7
A0-A7
T
T
LLAX
T
T
LLAX
AVWL
AVWL
T
T
LLWL
LLWL
Parameter
Serial port clock cycle time
Output data set-up to clock rising edge
Output data hold after clock rising edge
Input data hold after clock rising edge
Clock rising edge to input data valid
T
AVDV
T
LLDV
ADDRESS A8-A15 OR SFR P2
ADDRESS A8-A15 OR SFR P2
T
T
QVWX
RLAZ
T
QVWH
T
T
DATA OUT
WLWH
RLRH
DATA IN
T
T
T
WHLH
WHLH
RHDX
T
T
RHDZ
WHQX
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