MAX1258 Maxim Integrated Products, MAX1258 Datasheet - Page 30

• Manufacturer Part Number: MAX1258
• Description: Multichannel ADCs/DACs
• Manufacturer: Maxim Integrated Products

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following the command byte load data from DIN to the
GPIO configuration register in the MAX1257/MAX1258.
See Tables 13 and 14. The register bits are updated
after the last CS rising edge. All GPIOs default to inputs
upon power-up.
The data in the register controls the function of each
GPIO, as shown in Tables 13–19.
Table 13. MAX1220/MAX1221 GPIO Configuration
Table 14. MAX1257/MAX1258 GPIO Configuration
Table 15. MAX1220/MAX1221 GPIO Write
Table 16. MAX1257/MAX1258 GPIO Write
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
30
DIN
DOUT
DIN
DOUT
DIN
DOUT
DIN
DOUT
DATA PIN
DATA PIN
DATA PIN
DATA PIN
______________________________________________________________________________________
0
0
0
0
0
0
0
0
0
0
0
0
GPIO COMMAND BYTE
GPIO COMMAND BYTE
0
0
0
0
0
0
0
0
GPIO COMMAND BYTE
GPIO COMMAND BYTE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
1
0
0
0
1
0
1
0
0
0
1
0
0
0
0
0
GPIOC1
GPIOC1
0
0
0
DATA BYTE 1
DATA BYTE 1
0
0
0
Write the command byte 00000010 to indicate a GPIO
write operation. The eight SCLK cycles following the
command byte load data from DIN into the GPIO write
register in the MAX1220/MAX1221. The 16 SCLK
cycles following the command byte load data from DIN
into the GPIO write register in the MAX1257/MAX1258.
See Tables 15 and 16. The register bits are updated
after the last CS rising edge.
GPIOC0
0
0
GPIOC0
0
0
0
0
0
0
GPIOA1
GPIOA1
DATA BYTE
0
0
DATA BYTE
0
0
0
0
GPIOA0
0
0
GPIOA0
0
0
0
0
DATA BYTE 2
DATA BYTE 2
0
0
X
0
X
0
X
X
0
0
X
0
X
0
GPIO Write
X
0
X
0
X
0
0
X
X
X
0
0
X
X
0
0
X
0
0
X