Registers; Input Capture Register 1 (Icr1); Prescalar Unit Control/Status Register (Pcsr) - Renesas Hitachi H8S/2194 Series Hardware Manual

22.2

Registers

22.2.1

Input Capture Register 1 (ICR1)

Bit : 7
ICR17
Initial value : 0
R/W :
R
Input capture register 1 (ICR1) captures 8-bit data of 2
,&
of the pin.
ICR1 is an 8-bit read-only register. The write operation becomes invalid. The ICR1 values are
undefined until the first capture is generated after the mode has been set to the standby mode,
watch mode, subactive mode, and subsleeve mode. When reset, ICR1 is initialized to H'00.
22.2.2

Prescalar Unit Control/Status Register (PCSR)

Bit :
7
ICIF
0
Initial value :
R/(W) *
R/W :
Note: * Only 0 can be written to clear the flag.
The prescalar unit control/status register (PCSR) controls the input capture function and selects
the frequency division clock that is output from the TMOW pin.
PCSR is an 8-bit read/write enable register. When reset, PCSR is initialized to H'08.
Bit 7: Input Capture Interrupt Flag (ICIF)
Input capture interrupt request flag. This indicates that the input capture was performed
according to the edge of the
Bit 7
ICIF Description
0 [Clear condition]
When 0 is written after 1 has been read
1 [Set condition]
When the input capture was performed according to the edge of the
Rev. 2.0, 11/00, page 434 of 1037
6 5
ICR16 ICR15 ICR14
0 0
R R
6 5
ICIE ICEG NCon/off
0 0
R/W R/W
,&
pin.
4 3
ICR13 ICR12
0 0
R R R
15 8
to 2 of the FRC according to the edge
4 3
—
DCS2
0 1
R/W — R/W
2 1 0
ICR11 ICR10
0 0 0
R R
2 1 0
DCS1 DCS0
0 0 0
R/W R/W
(Initial value)
,&
pin