73s1217f68im Maxim Integrated Products, Inc., 73s1217f68im Datasheet - Page 71

Manufacturer Part Number

73s1217f68im

Description

Bus-powered 80515 System-on-chip With Usb, Iso 7816 / Emv, Pinpad And More

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.73S1217F68IM.pdf (140 pages)

Keypad Scan Time Register (KSCAN): 0xD3

This register contains the values of scanning time and debouncing time.

Rev. 1.2

KSCAN.7

KSCAN.6

KSCAN.5

KSCAN.4

KSCAN.3

KSCAN.2

KSCAN.1

KSCAN.0

MSB

DBTIME.5 DBTIME.4 DBTIME.3 DBTIME.2 DBTIME.1 DBTIME.0 SCTIME.1 SCTIME.0

Bit

DBTIME.5

DBTIME.4

DBTIME.3

DBTIME.2

DBTIME.1

DBTIME.0

SCTIME.1

SCTIME.0

Symbol

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.

Table 71: The KSCAN Register

0x00

Function

LSB