Details On Registers Of Input Capture - Fujitsu FR60 Hardware Manual

18.4 Details on Registers of Input Capture

This section describes the details on the registers of the input capture. The input
capture has the following two data registers:
• Input capture data registers (IPCP0 to IPCP3)
• Input capture control registers (ICS01, ICS23)
■ Input Capture Data Registers (IPCP0 to IPCP3)
IPCP0 to IPCP3
Address: 0000DA
0000D8
0000DE
0000DC
0000DB
0000D9
0000DF
0000DD
The input capture data registers (IPCP0 to IPCP3) are used to store the value of the 16-bits free
run timer when an effective edge of the corresponding external pin input waveform is detected.
This register is undefined at a reset. This register must be accessed in 16-bit or 32-bit data. The
user cannot write any value to this register.
■ Input Capture Control Registers (ICS01, ICS23)
ICS23
Address: 0000E1
ICS01
Address: 0000E3
[bit7, bit6]: ICP3, ICP2, ICP1, and ICP0
These bits are used as input-capture interrupt flags. When a effective edge of an external
input pin is detected, these bits are set to "1". When the interrupt permission bits (ICE3,
ICE2, ICE1, and ICE0) are also set, an interrupt is generated as soon as the effective edge
is detected. To clear these bits, set them to "0". Setting these bits to "1" has no effect. Read
operations with read-modify-write instructions always read "1" for these bits.
ICPn
0
1
"n" in ICPn indicates an input capture channel number.
bit 14 13
15
CP15 CP14 CP13
H
R R R
H
H
H
bit 6 5
7
CP07 CP06 CP05
H
R R R
H
H
H
bit
7 6 5
ICP3 ICP2 ICE3
H
R/W R/W R/W
bit
7 6 5
ICP1 ICP0 ICE1
H
R/W R/W R/W
No effective edge is detected. (initial value)
An effective edge is detected.
12 11 10
CP12 CP11 CP10 CP09
R R R R
4 3 2
CP04 CP03 CP02 CP01
R R R R
4 3 2
ICE2 EG31 EG30 EG21
R/W R/W R/W R/W
4 3 2
ICE0 EG11 EG10 EG01
R/W R/W R/W R/W
Input capture interrupt flag
CHAPTER 18 INPUT CAPTURE
9 8
CP08 Initial value
R xxxxxxxx
B
1 0
CP00 Initial value
R xxxxxxxx
B
1 0
EG20 Initial value
00000000
R/W
B
1 0
EG00 Initial value
00000000
R/W
B
493