參數(shù)資料
型號: MC68HC05G1B
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封裝: SDIP-56
文件頁數(shù): 71/124頁
文件大?。?/td> 732K
代理商: MC68HC05G1B
MOTOROLA
6-4
MC68HC05G1
CLOCKS
6
The hours and minutes registers are in fact holding registers (See Figure 6-3). When setting the
RTC time, the hours and minutes are written rst, then writing to the seconds register will cause
the hours and minutes in their holding registers to be latched into the RTC hardware.
When reading the RTC time, the seconds register is rst accessed; this will cause the hardware
to latch the hours and minutes into their respective holding registers. Now, reading the hours and
minutes registers will give the time for the moment when the seconds register was read.
6.2.2
RTC Alarm Registers
There are three locations associated with the alarm registers. They are:
The ALF bit in the RTC Status register is set when the contents of the RTC Alarm registers
matches the contents of the RTC Time registers.
Figure 6-3 RTC Holding Registers
RTC Hour Alarm
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on Reset
$0C
0000 0000
RTC Minute Alarm
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on Reset
$0D
0000 0000
RTC Second Alarm
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on Reset
$0E
0000 0000
Hours
Minutes ($10)
Seconds ($11)
Hours ($0F)
Minutes
CPU CORE
Holding registers
RTC Hardware registers
TPG
46
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