參數(shù)資料
型號: UPD703201
廠商: NEC Corp.
英文描述: 32-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 32位單晶片微控制器
文件頁數(shù): 40/98頁
文件大小: 797K
代理商: UPD703201
Preliminary Product Information U15436EJ1V0PM
40
μ
PD703201, 703201Y, 703204, 703204Y, 70F3201, 70F3201Y, 70F3204, 70F3204Y
10. REAL-TIME COUNTER FUNCTION
The real-time counter function has the following features.
{
{
Includes counters of weeks, days, hours, minutes, and seconds, and can count up to 4,095 weeks.
Counters of weeks, days, hours, minutes, and seconds can be read during operation and while operation is
stopped.
Week counter overflow interrupt request occurrence (INTROV)
Interval interrupt request occurrence (INTRTC) at a fixed interval (can be selected from the following)
0.015625 seconds, 0.03125 seconds, 0.0625 seconds, 0.125 seconds, 0.25 seconds, 0.5 seconds, 1 second,
1 minute, 1 hour, 1 day
When subclock (f
XT
) is selected, operable only with power supply to V
DD
BU.
{
{
{
The following figure shows the configuration of the real-time counter function.
Count enable/
disable circuit
Subcounter
(15 bits)
Second counter
(6 bits)
Internal bus
Second counter
write buffer
Minute counter
write buffer
Hour counter
write buffer
Day counter
write buffer
Week counter
write buffer
Minute counter
(6 bits)
Hour counter
(5 bits)
Day counter
(3 bits)
Week counter
(12 bits)
INTROV
INTRTC
1 second
0.015625 seconds/0.03125 seconds/0.0625 seconds/0.125 seconds/
0.25 seconds/0.5 seconds
1 minute
1 hour
1 day
Count clock = 32.768 kHz
f
XT
f
X
/2
6
to
f
X
/2
9
S
S
Remark
f
X
:
Main clock frequency
f
XT
: Subclock frequency
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