LAPIS Semiconductor ML610421, User Manual, Page: 122 / 437

ML610Q421/ML610Q422/ML610421 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 base counter
(LTBC) to the capture 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.
For the external interrupt (P00INT, P01INT) from the P00 or P01 pin, see Chapter 5, "Interrupt" and Chapter 18, "Port
0".
8.1.1 Features
•
Time base capture
×
2ch (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
Figure 8-1 Configuration of Capture Circuit
8.1.3 List of Pins
Pin name I/O Description
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
CAPSTAT
Capture
Controller
R
CAPR1
LTBC
Write CAPR1
8
8
Data bus
T32HZ
T64HZ
T128HZ
T256HZ
T512HZ
T1KHZ
T4KHZ
T2KHZ
LSCLK
(32.768kHz)
CAPR0
P01INT
P00INT
Write CAPR0
CP0F
R
Interrupt request signal
CAPCON