RV-8523 Datasheet, PDF (19/57 Pages) MICORO CRYSTAL SWITZERLAND – Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8523
8.6.3.TIMER A (address 11h…bits description)
Address
11h
Function
Timer A
Bit 7
128
Bit 6
64
Bit 5
32
Bit 4
16
Bit 3
8
Bit
7 to 0
Symbol
Timer A
Value
00 to FF
Description
Timer period in seconds
Countdown value = n
Timer Period =
n
Source Clock Frequency
Bit 2
4
Bit 1
2
Bit 0
1
8.6.4.TIMER B CLOCK (address 12h…bits description)
Address
12h
Function
Timer B Clock
Bit 7
X
Bit 6
TBW2
Bit 5
TBW1
Bit 4
TBW0
Bit 3
X
Bit
Symbol
7
X
6 to 4
TBW[2:0]²⁾
3
2 to 0
X
TBQ[2:0]³⁾
Value
-
000¹⁾
001
010
011
100
101
110
111
-
000
001
010
011
111¹⁾
110
100
Description
Unused
46.875 ms
62.500 ms
78.125 ms
93.750 ms
125.000 ms
156.250 ms
187.500 ms
218.750 ms
Unused
4.096 kHz
64 Hz
1 Hz
1_{/60 Hz}
1_{/3600 Hz}
1) _{Default value.}
2) _{Low pulse width for pulsed timer B interrupt.}
3) _{Source clock for timer B (see section 9.9.)}
8.6.5.TIMER B (address 13h…bits description)
Address
13h
Function
Timer B
Bit 7
128
Bit 6
64
Bit 5
32
Bit 4
16
Bit 3
8
Bit
7 to 0
Symbol
Timer B
Value
00 to FF
Description
Timer period in seconds
Countdown value = n
Timer Period =
n
Source Clock Frequency
Bit 2
TBQ2
Bit 2
4
Bit 1
TBQ1
Bit 1
2
Bit 0
TBQ0
Bit 0
1
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