MS51
Nov. 28, 2019
Page
123
of 491
Rev 1.00
MS51
32K
SE
RIES
TE
CHNICAL RE
F
EREN
CE MA
N
UAL
TA
– Timed Access
Register
SFR Address
Reset Value
TA
C7H, Page 0
0000_0000 b
7
6
5
4
3
2
1
0
TA[7:0]
W
Bit
Name
Description
7:0
TA[7:0]
Timed access
The timed access register controls the access to protected SFRs. To access protected bits, user
should first write AAH to the TA and immediately followed by a write of 55H to TA. After these two
steps, a writing permission window is opened for 4 clock cycles during this period that user may
write to protected SFRs.