參數(shù)資料
型號: MC68CK338
廠商: Motorola, Inc.
元件分類: 32位微控制器
英文描述: Highly Integrated, Low-Power, 32-Bit Microcontroller
中文描述: 高度集成,低功耗,32位微控制器
文件頁數(shù): 105/133頁
文件大?。?/td> 798K
代理商: MC68CK338
MC68CK338
MC68CK338TS/D
MOTOROLA
105
Figure 24 RTCSM Block Diagram
6.11.1 RTCSM Registers
The RTCSM contains one status/interrupt/control register, one 15-bit prescaler register and two 32-bit
free-running counter registers (high and low). All unused bits and reserved address locations return
zero when read. Writing to unused bits and reserved address locations has no effect.
TICKF — 1 Hz Clock Tick Flag
TICKF is set each time the 32-bit free-running counter is incremented. Software can clear TICKF by
reading the bit as a one, then writing a zero to it. If the IL[2:0] field is non-zero, an interrupt request is
generated when TICKF is set.
TICKF is not affected by reset.
RTC16SIC —
RTCSM Status/Interrupt/Control Register
$YFF480
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
TICKF
IL[2:0]
IARB3
0
WEN
EN
NOT USED
RESET:
U
0
0
0
0
0
0
U
0
0
0
0
0
0
0
0
CTM RTC BLOCK
INTERRUPT
LOGIC
SUBMODULE BUS
15-BIT PRESCALER
BUFFER
15-BIT
FLAG
(1 H
z
)
32-BIT FREE-RUNNING
COUNTER BUFFER
32-BIT FREE-RUNNING
COUNTER
PRESCALER
INTERRUPT LEVEL
CONTROL
LOGIC
ARB3
WEN
EN
WRITE
ENABLE
ENABLE
STATUS, INTERRUPT,
AND CONTROL REGISTER BITS
1 H
z
EXTAL
XTAL
LOW POWER OSCILLATOR
32.768 kHz
10 pF
1
1 pF
1
10 k
1. RESISTANCE AND CAPACITANCE BASED ON A TEST CIRCUIT CONSTRUCTED WITH A DAISHINKU DMX-38 32.768 kHz CRYSTAL.
SPECIFIC COMPONENTS MUST BE BASED ON CRYSTAL TYPE. CONTACT CRYSTAL VENDOR FOR EXACT CIRCUIT.
NOTES:
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