73S1210F-44M/F/PC Maxim Integrated Products, 73S1210F-44M/F/PC Datasheet - Page 64
73S1210F-44M/F/PC
Manufacturer Part Number
73S1210F-44M/F/PC
Description
Microcontrollers (MCU)
Manufacturer
Maxim Integrated Products
Datasheet
1.73S1210F-44MFPC.pdf
(126 pages)
Specifications of 73S1210F-44M/F/PC
Lead Free Status / Rohs Status
Details
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73S1210F Data Sheet
Keypad Column Register (KCOL): 0xD1 0x1F
This register contains the value of the column of a key detected as valid by the hardware. In bypass
mode, this register firmware writes directly this register to carry out manual scanning.
Keypad Row Register (KROW): 0xD2 0x3F
This register contains the value of the row of a key detected as valid by the hardware. In bypass mode,
this register firmware reads directly this register to carry out manual detection.
64
KROW.7
KROW.6
KROW.5
KROW.4
KROW.3
KROW.2
KROW.1
KROW.0
KCOL.7
KCOL.6
KCOL.5
KCOL.4
KCOL.3
KCOL.2
KCOL.1
KCOL.0
Bit
Bit
MSB
MSB
–
–
Symbol
Symbol
ROW.6
ROW.4
ROW.3
ROW.2
ROW.1
ROW.0
COL.4
COL.3
COL.2
COL.1
COL.0
–
–
–
–
–
–
–
Drive lines bit mapped to corresponding with pins COL(4:0). When a key
is detected, firmware reads this register to determine column. In bypass
(S/W keyscan) mode, Firmware writes this register directly. 0x1E =
COL(0) low, all others high. 0x0F = COL(4) low, all others high. 0x1F =
COL(4:0) all high.
Sense lines bit mapped to correspond with pins ROW(5:0). When key
detected, firmware reads this register to determine row. In bypass mode,
firmware reads rows and has to determine if there was a key press or not.
0x3E = ROW(0) low, all others high. 0x1F = ROW(5) low, all others high.
0x3F = ROW(5:0) all high.
ROW.5
Table 65: The KROW Register
–
Table 64: The KCOL Register
ROW.4
COL.4
ROW.3
COL.3
Function
Function
ROW.2
COL.2
ROW.1
COL.1
ROW.0
COL.0
LSB
LSB
DS_1210F_001
Rev. 1.4
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