SAB80C517-M16 SIEMENS [Siemens Semiconductor Group], SAB80C517-M16 Datasheet - Page 122

• Manufacturer Part Number: SAB80C517-M16
• Description: 8-Bit CMOS Single-Chip Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Figure 7-52
CMx-Register Assigned to Timer 2
7.5.6
Each of the four compare/capture registers CC1 to CC4 and the CRC register can be used to latch
the current 16-bit value of the timer 2 registers TL2 and TH2. Two different modes are provided for
this function. In mode 0, an external event latches the timer 2 contents to a dedicated capture
register. In mode 1, a capture will occur upon writing to the low order byte of the dedicated 16-bit
capture register. This mode is provided to allow the software to read the timer 2 contents "on-the-
fly".
In mode 0, the external event causing a capture is
Semiconductor Group
– for CC registers 1 to 3: a positive transition at pins CC1 to CC3 of port 1
– for the CRC and CC4 register: a positive or negative transition at the corresponding pins,
depending on the status of the bits I3FR and I2FR in SFR T2CON. lf the edge flags are
cleared, a capture occurs in response to a negative transition; if the edge flags are set a
capture occurs in response to a positive transition at pins P1.0/ INT3/ CC0 and P1.4/ INT2/
CC4.
Capture Function in the CCU
123
On-Chip Peripheral Components