C508_01 Datasheet, PDF (134/267 Pages) Infineon Technologies AG – 8-Bit CMOS Microcontroller

C508
On-Chip Peripheral Components
Capture/Compare Registers of CAPCOM Unit
The capture/compare registers are 16-bit registers, organized as two 8-bit byte-wide
registers. Each of the three CAPCOM channels has one capture/compare register. In
compare mode, they hold a compare value which typically defines the duty cycle of the
output signals. In capture mode, the actual Compare Timer 1 value is transferred into the
Capture/Compare registers at a Capture event.
If CCLx/CCHx is written, shadow latches are always loaded. The content of these
shadow latches is transferred to the real registers when STE1 is set and the Compare
Timer 1 reaches its period value (operating mode 0) or count value 0000_H (operating
mode 1). When the Capture/Compare registers are read, the real registers are always
accessed because of capture mode.
Special Function Registers CCL0/CCH0 (Addresses F2_H / F3_H) Reset Value: 00_H
Special Function Registers CCL1/CCH1 (Addresses F4_H / F5_H) Reset Value: 00_H
Special Function Registers CCL2/CCH2 (Addresses F6_H / F7_H) Reset Value: 00_H
Bit No. MSB
LSB
7
6
5
4
3
2
1
0
F2_H
.7
.6
.5
.4
.3
.2
.1 LSB CCL0
F3_H MSB .6
.5
.4
.3
.2
.1
.0 CCH0
F4_H
.7
.6
.5
.4
.3
.2
.1 LSB CCL1
F5_H MSB .6
.5
.4
.3
.2
.1
.0 CCH1
F6_H
.7
.6
.5
.4
.3
.2
.1 LSB CCL2
F7_H MSB .6
.5
.4
.3
.2
.1
.0 CCH2
Bit
CCLx.7 - 0
x = 0-2
CCHx.7 - 0
x = 0-2
Function
Capture/Compare value, low byte
The 8-bit value in the CCLx register is the low byte of the 16-bit
capture/compare value of channel x.
Capture/Compare value, high byte
The 8-bit value in the CCHx register is the low byte of the 16-bit
capture/compare value of channel x.
User’s Manual
6-69
2001-05