C541U Datasheet, PDF (58/63 Pages) Siemens Semiconductor Group – 8 BIT CMOS MICROCONTROLLER

C541U
PMSEL1,0
H, L
H, L
Port 0
PROG
PRD
t _PMS
D0, D1
t _PCS
t _PWW
t _PCH
t _PMH
D0, D1
t _PMS t _PRD
t _PRW
t _PDH
t _PDF
t _PMH
Note: PALE should be low during a lock bit read / write cycle.
MCT03393
Figure 30
Lock Bit Access Timing
PMSEL1,0
L, H
Port 2
Port 0
PRD
t _PCS
t _PMS
e. g. FD _H
t _PCH
D0-7
t _PRD
t _PRW
t _PDH
t _PDF
t _PMH
Note: PROG must be high during a programming read cycle.
MCT03394
Figure 31
Version Byte Read Timing
Semiconductor Group
56