參數(shù)資料
型號(hào): 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): 69/124頁
文件大小: 732K
代理商: MC68HC05G1B
MC68HC05G1
MOTOROLA
6-3
CLOCKS
6
6.2
REAL TIME CLOCK
Continuous or non-continuous RTC operation can be selected by programming the STPOSC bit
in the PLL Status & Control register (bit 4 of address $24). Real time clock consists of three binary
counters which are divided down from the 32.768KHz oscillator. There are three bits in the RTC
status register (address $1C) and three bits in the RTC Control register (address $1D) where the
operation of the real time clock is controlled.
6.2.1
RTC Time Registers
Three locations are reserved for real time clock operation; they are:
Figure 6-2 Typical Waveform for PLL
RTC Hours
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
$0F
RTC Minutes
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
$10
RTC Seconds
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
$11
VDD
GND
1KHz
REFERENCE SIGNAL
VCOout AFTER
DIVIDED BY N
PCOUT
VCOIN
TPG
45
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