11-10
MSM66591/ML66592 User's Manual
Chapter 11 Flexible Timer (FTM)
11.3 Type A1 Register Modules (TMR0–TMR3)
The MSM66591/ML66592 have four sets of type A1 register modules (TMR0–TMR3).
The configuration is the same for all the sets, except for the address of registers on
SFR.
11.3.1 Configuration of Type A1 Register Modules (TMR0–TMR3)
Type A1 register modules have a capture input function. Figure 11-7 shows the configu-
ration of a type A1 register module.
Type A1 register modules consist of a 20-bit timer register (TMRn, TMRnL), a pin to
input external events (CAPn), the edge detection of an external event, a divider to
divide an external event, a timing controller, and control registers (CAPCON,
EVNTCONL, EVNTCONH) to specify the operation of the valid edge of an external
event and the operation of a divider.
If CAP0–CAP3 pins are used as a capture function, set the bit corresponding to the
Port 3 secondary function control register to "1".
Figure 17-1 shows the configuration of type A1 register module.
Figure 11-7 Configuration of Type A1 Register Module
[1]
Timer Registers (TMR0, TMR0L–TMR3, TMR3L)
The timer register consists of 20 bits, that are divided into high-order 16 bits (TMR0–
TMR3) and low-order 4 bits (TMR0L–TMR3L). The counter specified by TMSEL is
connected to TMR0–TMR3, and the low-order 4 bits of the 20-bit counter are always
connected to TMR0L–TMR3L.
If the specified valid edge is input to CAP0–CAP3 pins for the specified number of
pulses, a capture event is generated. In that case, the 16-bits of the content of the
counter specified by TMSEL are loaded to TMR0L–TMR3L, and the content of the low-
order 4 bits of the 20-bit counter is loaded to TMR0L–TMR3L.
TMR0–TMR3 and TMR0L–TMR3L cannot be written, but can be read by the program.
However, if TMR0L–TMR3L are read, the high-order 4 bits are valid, and "1" is read
from the low-order 4 bits.
CAPCON
TMRn
CAPn input
Edge
Detection n
Dividing
Circuit n
Timing
Controller n
CLK
TnSEL
TMDS
TMD
TM0L4
19
12
4 3
n = 0–3
Interrupt
EVNTCONL,
EVNTCONH
TMRnL
0
1
1
1
1
Содержание MSM66591
Страница 1: ...MSM66591 ML66592 User s Manual CMOS 16 bit microcontroller FEUL66591 66592 01 Issue Date Mar 4 2002...
Страница 15: ...Contents 12...
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Страница 18: ...Overview Chapter 1 1...
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Страница 30: ...Description of Pins Chapter 2 2...
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Страница 44: ...CPU Architecture Chapter 3 3...
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Страница 101: ...3 56 MSM66591 ML66592User sManual Chapter 3 CPU Architecture...
Страница 102: ...CPU Control Functions Chapter 4 4...
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Страница 112: ...Memory Control Functions Chapter 5 5...
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Страница 118: ...Port Functions Chapter 6 6...
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Страница 156: ...Clock Generation Circuit Chapter 8 8...
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Страница 160: ...Time Base Counter TBC Chapter 9 9...
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Страница 164: ...Watchdog Timer WDT Chapter 10 10...
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Страница 214: ...General Purpose 8 Bit Timer Function Chapter 12 12...
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Страница 224: ...PWM Functions Chapter 13 13...
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Страница 244: ...Baud Rate Generator Functions Chapter 14 14...
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Страница 264: ...Serial Port Functions Chapter 15 15...
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Страница 348: ...A D Converter Functions Chapter 16 16...
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Страница 388: ...Peripheral Functions Chapter 18 18...
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Страница 392: ...External Interrupt Request Function Chapter 19 19...
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Страница 396: ...Interrupt Request Processing Function Chapter 20 20...
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Страница 414: ...Expansion Port Chapter 22 22...
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Страница 432: ...RAM Monitor Function Chapter 24 24...
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Страница 442: ...25 Electrical Characteristics Chapter 25...
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