DS_1217F_002
73S1217F Data Sheet
Keypad Scan Time Register (KSCAN): 0xD3 Å 0x00
This register contains the values of scanning time and debouncing time.
Table 71: The KSCAN Register
MSB
LSB
DBTIME.5 DBTIME.4 DBTIME.3 DBTIME.2 DBTIME.1 DBTIME.0 SCTIME.1 SCTIME.0
Bit
Symbol
Function
KSCAN.7
KSCAN.6
KSCAN.5
KSCAN.4
KSCAN.3
KSCAN.2
KSCAN.1
KSCAN.0
DBTIME.5
DBTIME.4
DBTIME.3
DBTIME.2
DBTIME.1
DBTIME.0
SCTIME.1
SCTIME.0
De-bounce time in 4ms increments. 1 = 4ms de-bounce time, 0x3F =
252ms, 0x00 = 256ms. Key presses and key releases are de-bounced by
this amount of time.
Scan time in ms. 01 = 1ms, 02 = 2ms, 00 = 3ms, 00 = 4ms. Time between
checking each key during keypad scanning.
Rev. 1.2
71