EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 189
EZ80F91MCU
Manufacturer Part Number
EZ80F91MCU
Description
eZ80Acclaim-TM Flash Microcontrollers
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.EZ80F91MCU.pdf
(396 pages)
- Current page: 189 of 396
- Download datasheet (5Mb)
PS019209-0504
Real-Time Clock Hours Register
This register contains the current hours count. The value in the RTC_HRS register
is unchanged by a RESET. The current setting of BCD_EN determines whether
the values in this register are 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 82.
Table 82. Real-Time Clock Hours Register
(RTC_HRS = 00E2h)
Bit
Reset
CPU Access
Note: X = Unchanged by RESET; R/W* = Read Only if RTC locked, Read/Write if RTC unlocked.
Binary-Coded-Decimal Operation (BCD_EN = 1)
Bit
Position
[7:4]
TEN_HRS
[3:0]
HRS
Binary Operation (BCD_EN = 0)
Bit
Position
[7:0]
HRS
Value Description
0–2
0–9
Value Description
00h–
17h
R/W*
The tens digit of the current hours count.
The ones digit of the current hours count.
The current hours count.
P R E L I M I N A R Y
X
7
R/W*
6
X
R/W*
X
5
R/W*
X
4
R/W*
X
3
Product Specification
R/W*
X
2
eZ80F91 MCU
Real-Time Clock
R/W*
X
1
R/W*
X
0
170
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