EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 194

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

PS019209-0504
Real-Time Clock Century Register
This register contains the current century count. The value in the RTC_CEN regis-
ter 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 deci-
mal (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 87.
Table 87. Real-Time Clock Century Register
(RTC_CEN = 00E7h)
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]
TENS_CEN
[3:0]
CEN
Binary Operation (BCD_EN = 0)
Bit
Position
[7:0]
CEN
Value Description
0–9
0–9
Value Description
00h–
63h
R/W*
The tens digit of the current century count.
The ones digit of the current century count.
The current century 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
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