EZ80F91MCU Datasheet, PDF (190/396 Pages) Zilog, Inc. – eZ80Acclaim-TM Flash Microcontrollers

eZ80F91 MCU
Product Specification
171
Real-Time Clock Day-of-the-Week Register
This register contains the current day-of-the-week count. The RTC_DOW register
begins counting at 01h. The value in the RTC_DOW register is unchanged by a
RESET. The current setting of BCD_EN determines whether the value in this reg-
ister is binary (BCD_EN = 0) or binary-coded decimal (BCD_EN = 1). Access to
this register is Read Only if the RTC is locked and Read/Write if the RTC is
unlocked. See Table 83.
Table 83. Real-Time Clock Day-of-the-Week Register
(RTC_DOW = 00E3h)
Bit
7
6
5
4
3
2
1
0
Reset
0
0
0
0
X
X
X
X
CPU Access
R
R
R
R R/W* R/W* R/W* R/W*
Note: X = Unchanged by RESET; R = Read Only; R/W* = Read Only if RTC locked, Read/Write if
RTC unlocked.
Binary-Coded-Decimal Operation (BCD_EN = 1)
Bit
Position
[7:4]
[3:0]
DOW
Value Description
0000 Reserved.
1–7 The current day-of-the-week.count.
Binary Operation (BCD_EN = 0)
Bit
Position
[7:4]
[3:0]
DOW
Value Description
0000 Reserved.
01h– The current day-of-the-week count.
07h
PS019209-0504
PRELIMINARY
Real-Time Clock