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MC68HC908AP16CFB Datasheet(PDF) 207 Page - Motorola, Inc

Part # MC68HC908AP16CFB
Description  Microcontrollers
PDF  440 Pages
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC68HC908AP16CFB Datasheet(HTML) 207 Page - Motorola, Inc

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Timebase Module (TBM)
Timebase Register Description
MC68HC908AP Family — Rev. 2.5
Data Sheet
MOTOROLA
207
12.4 Timebase Register Description
The timebase has one register, the TBCR, which is used to enable the
timebase interrupts and set the rate.
TBIF — Timebase Interrupt Flag
This read-only flag bit is set when the timebase counter has rolled
over.
1 = Timebase interrupt pending
0 = Timebase interrupt not pending
TBR[2:0] — Timebase Rate Selection
These read/write bits are used to select the rate of timebase interrupts
as shown in Table 12-1.
Address:
$0051
Bit 7
654321
Bit 0
Read:
TBIF
TBR2
TBR1
TBR0
0
TBIE
TBON
R
Write:
TACK
Reset:
00000000
= Unimplemented
R
= Reserved
Figure 12-2. Timebase Control Register (TBCR)
Table 12-1. Timebase Rate Selection for OSCCLK = 32.768 kHz
TBR2
TBR1
TBR0
Divider
Timebase Interrupt Rate
Hz
ms
0
0
0
262144
0.125
8000
0
0
1
131072
0.25
4000
0
1
0
65536
0.5
2000
0
1
1
32768
1
1000
10
0
64
512
~2
10
1
32
1024
~1
11
0
16
2048
~0.5
1
1
1
8
4096
~0.24
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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