Datasheet
PGA280
SBOS487A –JUNE 2009–REVISED SEPTEMBER 2009................................................................................................................................................
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Register 5: GPIO Register (Read = 0x8500, Write = 0x45)
Bit # D7 D6 D5 D4 D3 D2 D1 D0
Bit Name — GPIO6 GPIO5 GPIO4 GPIO3 GPIO2 GPIO1 GPIO0
POR Value 0 0 0 0 0 0 0 0
Bit Descriptions:
GPIO[6:0]: The GPIO bits correspond to GPIO6 through GPIO0, respectively. The function of each bit
depends on whether the GPIO pin is configured as an input pin or an output pin, which is determined by the
setting in Register 8. When the GPIO pin is configured as an input, reading this register samples the GPIO
pin. When the GPIO pin is configured as an output, reading from this register reads back the forced data.
Register 6: Input Switch Control Register 1 (Read = 0x8600, Write = 0x46)
Bit # D7 D6 D5 D4 D3 D2 D1 D0
Bit Name — SW-A1 SW-A2 SW-B1 SW-B2 SW-C1 SW-C2 SW-D12
POR Value 0 1 1 0 0 0 0 0
Bit Descriptions:
Switch control; see Figure 44 for switch designation (switch closed = 1).
Example: Select INP2 and INN2: 0x18 // opens A1 and A2, and closes B1 and B2.
Register 7: Input Switch Control Register 2 (Read = 0x8700, Write = 0x47)
Bit # D7 D6 D5 D4 D3 D2 D1 D0
Bit Name — — — — SW-F1 SW-F2 SW-G1 SW-G2
POR Value 0 0 0 0 0 0 0 0
Bit Descriptions:
Switch control; see Figure 44 for switch designation.
Register 8: GPIO Configuration Register (Read = 0x8800, Write = 0x48)
Bit # D7 D6 D5 D4 D3 D2 D1 D0
Bit Name — DIR6 DIR5 DIR4 DIR3 DIR2 DIR1 DIR0
POR Value 0 0 0 0 0 0 0 0
Bit Descriptions:
DIR[6:0]: GPIO configuration for input or output; 0 for input; 1 for output. Power-on default is all inputs
(requires external termination or set to output ).
Register 9: CS Configuration Mode Register (Read = 0x8900, Write = 0x49)
Bit # D7 D6 D5 D4 D3 D2 D1 D0
Bit Name — ECS6 ECS5 ECS4 ECS3 ECS2 ECS1 ECS0
POR Value 0 0 0 0 0 0 0 0
Bit Descriptions:
ECS[6:0]: Configure CS function to respective pins. See CS Mode, in the GPIO Operation Mode section (a
single byte command applies).
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