pcf8583 NXP Semiconductors, pcf8583 Datasheet - Page 6

• Manufacturer Part Number: pcf8583
• Description: Clock/calendar With 240 X 8-bit Ram
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1997 Jul 15
handbook, full pagewidth
Clock/calendar with 240
MSB
7
MRB017
6
5
8-bit RAM
4
Fig.3 Control/status register.
3
2
6
1
LSB
0
memory location 00
reset state: 0000 0000
timer flag
alarm flag (50% duty factor
alarm enable bit:
0
1
mask flag:
0
1
function mode :
00 clock mode 32.768 kHz
01 clock mode 50 Hz
10 event-counter mode
11
hold last count flag :
0 count
1 store and hold last count in
stop counting flag :
0 count pulses
1 stop counting, reset divider
capture latches
alarm disabled: flags toggle
alarm control register disabled
(memory locations 08 to 0F
enable alarm control register
are free RAM space)
read locations 05 to 06
unmasked
read date and month count
directly
test modes
(memory location 08 is the
alarm control register)
seconds flag if alarm
enable bit is 0)
minutes flag if alarm
enable bit is 0)
(50% duty factor
Product specification
PCF8583