LAPIS Semiconductor ML610471, User Manual, Page: 106 / 281

ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 8 Capture
8-1
8. Capture
8.1 Overview
This LSI has two channels of capture circuits that capture the T4KHZ to T32HZ signals of the low-speed time base
counter (LTBC) to the capture data register at the occurrence of P00 and P01 interrupts. The circuits capture timings at
which each interrupt occurred, based on the time from the time base counter. It can also read out the T4KHZ to T32HZ
signals of the low-speed time base counter (LTBC) at any timing.
For the external interrupt (P00INT, P01INT) from the P00 or P01 pin, see Chapter 5, "Interrupt" and Chapter 12, "Port
0".
8.1.1 Features
•
Time base capture x 2 channels (4096Hz to 32Hz)
8.1.2 Configuration
Figure 8-1 shows the configuration of the capture
circuit.
CAPCON : Capture control register
CAPSTAT : Capture status register
CAPR0
: Capture data register 0
CAPR1 : Capture data register 1
CAPTB : Capture time base data register
Figure 8-1 Configuration of Capture Circuit
8.1.3 List of Pins
Pin name I/O Function
P00/CAP0 I
Capture 0 input pin
Used as the secondary function of the P00 pin.
P01/CAP1 I
Capture 1 input pin
Used as the secondary function of the P01 pin.
CP1F CP0F
CAPSTAT
Capture
Contoroller
R
CAPR1
LTBC
Write CAPR1
8
8
Data bus
T32HZ
T64HZ
T128HZ
T256HZ
T512HZ
T1KHZ
T4KHZ
T2KHZ
LSCLK
CAPR0
P01INT
P00INT
Write CAPR0
R
Interrupt request
signal
CAPCON
(32.768kHz)
8
CAPTB