ST10F273Z4 STMicroelectronics, ST10F273Z4 Datasheet - Page 61

• Manufacturer Part Number: ST10F273Z4
• Description: 16-BIT MICROCONTROLLER WITH MAC UNIT, UP TO 832 KBYTES FLASH MEMORY AND UP TO 68 KBYTES RAM
• Manufacturer: STMicroelectronics

Specifications of ST10F273Z4

• Single Voltage Supply: 5 V ±10%

ST10F273Z4
11.2
GPT2
The GPT2 module provides precise event control and time measurement. It includes two
timers (T5, T6) and a capture/reload register (CAPREL). Both timers can be clocked with an
input clock which is derived from the CPU clock via a programmable prescaler or with
external signals. The count direction (up/down) for each timer is programmable by software
or may additionally be altered dynamically by an external signal on a port pin (TxEUD).
Concatenation of the timers is supported via the output toggle latch (T6OTL) of timer T6
which changes its state on each timer overflow/underflow.
The state of this latch may be used to clock timer T5, or it may be output on a port pin
(T6OUT). The overflow / underflow of timer T6 can additionally be used to clock the
CAPCOM timers T0 or T1, and to cause a reload from the CAPREL register. The CAPREL
register may capture the contents of timer T5 based on an external signal transition on the
corresponding port pin (CAPIN), and timer T5 may optionally be cleared after the capture
procedure. This allows absolute time differences to be measured or pulse multiplication to
be performed without software overhead.
The capture trigger (timer T5 to CAPREL) may also be generated upon transitions of GPT1
timer T3 inputs T3IN and/or T3EUD. This is advantageous when T3 operates in Incremental
Interface mode.
Table 38
scaler option at 40MHz and 64MHz CPU clock respectively.
Table 38.
Table 39.
Pre-scaler
factor
Input frequency 10 MHz
Resolution
Period
maximum
Pre-scaler
factor
Input frequency 16 MHz
Resolution
Period
maximum
f
f
CPU
CPU
= 40MHz
= 64MHz
and
GPT2 timer input frequencies, resolutions and periods at 40 MHz
GPT2 timer input frequencies, resolutions and periods at 64 MHz
Table 39
6.55 ms 13.1 ms 26.2 ms
62.5 ns
4.1 ms
100ns
000b
000b
4
4
list the timer input frequencies, resolution and periods for each pre-
125 ns
8.2 ms
5 MHz
8 MHz
200ns
001b
001b
8
8
2.5 MHz
16.4 ms
250 ns
4 MHz
400ns
010b
010b
16
16
Timer Input Selection T5I / T6I
Timer Input Selection T5I / T6I
52.4 ms
32.8 ms
2 MHz
0.5 µs
0.8µs
011b
011b
MHz
1.25
32
32
625 kHz
65.5 ms 131.1ms 262.1 ms 524.3 ms
1.6 µs
1.0 µs
104.8
1 kHz
100b
100b
ms
64
64
General purpose timer unit
500 kHz
3.2 µs
2.0 µs
312.5
209.7
101b
101b
128
kHz
128
ms
419.4 ms 838.9 ms
250 kHz
156.25
6.4 µs
4.0 µs
110b
110b
256
kHz
256
128 kHz
12.8 µs
78.125
8.0 µs
111b
111b
512
kHz
512
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