X68C75 Datasheet, PDF (6/26 Pages) Xicor Inc. – Port Expander and E2 Memory

X68C75 SLIC^® E²
Figure 4. Block Protect Register Format
MSB
LSB
7 6543210
BLOCK
ADDRESS
0000-03FF
0400-07FF
0800-0BFF
0C00-0FFF
1000-13FF
1400-17FF
1800-1BFF
1C00-1FFF
“1” = Protect, “0” = Unprotect Block Specified
2899 ILL F06.1
The BPR format and block map are illustrated above.
The command sequence is illustrated to the right.
Figure 5. Setting BPR Command Sequence
AA
b2 b1 b0 P 555
55
b2 b1 b0 P AAA
A0
b2 b1 b0 P 555
AA
b2 b1 b0 P 555
C0
b2 b1 b0 P AAA
Write BPR mask value
to any address
Delay of t_WC
Figure 6. Microcontroller Map
0000
400
0400
07FF
7FF
Exit Routine
2899 ILL F07.1
(BPR Register Set Global SDP Set)
b2
b1
b0
Reference the A15–A13
setting in E2M register
P = Address bit (A12) of the
memory plane not being read.
SFR (SPECIAL FUNCTION
REGISTERS) BLOCK
MAPPABLE TO ANY 1K
PAGE BY THE SFRM
REGISTER.
E000
FFFF
E000
E150
SLIC
USER
APPLICATION
CODE/DATA
FF00
SLIC
FFC0
FFFF ^{ISR/RESET VECTORS}
8K BYTES OF BYTE
ALTERABLE DUAL
PLANE ARCHITECTURED
NON-VOLATILE MEMORY
(MAPPABLE TO ANY 8K
PAGE BY THE E2M BITS 2–0)
2899 ILL F07B.2
6