UPD78F1154GK-GAK-AX NEC, UPD78F1154GK-GAK-AX Datasheet - Page 40

• Manufacturer Part Number: UPD78F1154GK-GAK-AX
• Description: 16BIT MCU, 128K FLASH, 8K RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F1154GK-GAK-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 70
• Ram Memory Size: 8192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 9
• No. Of: RoHS Compliant
• Core Size: 16bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

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7.4 Real-Time Counter
The real-time counter has the following features.
• Having counters of year, month, week, day, hour, minute, and second, and can count up to 99 years.
• Constant-period interrupt function (period: 1 month to 0.5 seconds)
• Alarm interrupt function (alarm: week, hour, minute)
• Interval interrupt function
• Pin output function of 1 Hz
• Pin output function of 512 Hz or 16.384 kHz or 32 kHz
Remark f
Year count
register
(YEAR)
(8-bit)
f
SUB
Buffer
WALE
SUB
Real-time counter control register 1
WALIE WAFG
Month count
(MONTH)
register
: Subclock frequency
(5-bit)
12-bit counter
1 month
Buffer
(ALARMWW)
Alarm week
Week count
(WEEK)
register
RIFG
register
(3-bit)
(7-bit)
AMPM
Buffer
Figure 7-3. Block Diagram of Real-Time Counter
RWST
Day count
register
RWAIT
(DAY)
(6-bit)
Preliminary Product Information U17892EJ2V0PM
Buffer
1 day
RINTE RCLOE2
(ALARMWH)
Hour count
Alarm hour
RTCE RCLOE1 RCLOE0 AMPM
(HOUR)
register
register
(6-bit)
(6-bit)
Internal bus
Buffer
1 hour
Real-time counter control register 0
RCKDIV
Alarm minute
(ALARMWM)
Minute count
register
register
(7-bit)
(7-bit)
(MIN)
1 minute
Buffer
ICT2
Real-time counter control register 2
ICT1
Second
register
count
(SEC)
(7-bit)
CT2
Buffer
RCKDIV
ICT0
RINTE
CT1
RWST
Wait control
RCLOE2
CT0
Count enable/
disable circuit
RWAIT
RTCE
INTRTCI
seconds
f
SUB
RIFG
0.5
Sub-count
(RSUBC)
register
(16-bit)
Watch error
(SUBCUD)
correction
register
(8-bit)
Count clock
= 32.768 kHz
f
SUB
78K0R/KF3
RTCDIV/RTCCL
CT0 to CT2
INTRTC
RTC1HZ