HANBit
HMNR328D(V)
Register Map
Funtion /
Data
Address
Range BCD Format
D7
D6
D5
D4
D3
D2
D1
D0
7FFF
7FFE
7FFD
7FFC
7FFB
7FFA
7FF9
7FF8
7FF7
7FF6
7FF5
7FF4
7FF3
7FF2
7FF1
7FF0
10Years
Year
Year
Month
Date
00-99
01-12
01-31
01-07
00-23
00-59
00-59
0
0
0
0
0
10M
0
Month
Date : Day of Month
Day
10 Date
0
FT
0
0
0
Day
0
10 Hours
10 Minutes
Hours(24 Hour Format)
Minutes
Hours
Minutes
Seconds
Control
0
ST
W
0
10 Seconds
Seconds
R
0
0
0
0
0
0
S
0
0
0
0
0
0
Calibration
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1000 Years
100 Years
Century
Flag
00-99
0
0
0
BL
0
0
0
0
Keys :
R = READ Bit
W = WRITE Bit
ST = Stop Bit
0 = Must be set to ’0’
BL = Battery Low Flag
S = Sign Bit
CLOCK OPERATIONS
The HMNR328D(V) offers 16 internal registers which contain TIMEKEEPER, and Control data. These registers are
memory locations which contain external (user accessible) and internal copies of the data. The external copies are
independent of internal functions except that they are updated periodically by the simultaneous transfer of the incremented
internal copy. TIMEKEEPER Registers store data in BCD. Control Registers store data in Binary Format.
Reading the Clock
Updates to the TIMEKEEPER registers should be halted before clock data is read to prevent reading data in transition.
The TIMEKEEPER cells in the RAM array are only data registers and not the actual clock counters, so updating the
registers can be halted without disturbing the clock itself. Updating is halted when a ’1’ is written to the READ Bit, D6 in the
Control Register (7FF8h). As long as a ’1’ remains in that position, updating is halted. After a halt is issued, the registers
reflect the count; that is, the day, date, and time that were current at the moment the halt command was is-sued. All of the
TIMEKEEPER registers are updated simultaneously. A halt will not interrupt an update in progress. Updating occurs
approximately 1 second after the READ Bit is reset to a ’0.’
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10
HANBit Electronics Co.,Ltd.
Rev. 0.0 (January, 2002)
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
