Datasheet

LMP90077, LMP90078, LMP90079, LMP90080
www.ti.com SNAS521F –JULY 2011–REVISED MARCH 2013
Table 34. SPI_CRC_DAT
CRC Data (Address 0x1D)
Bit Bit Symbol Bit Description
CRC Data
When written, this register reset CRC:
[7:0] CRC_DAT
Any Value: Reset CRC
When read, this register indicates the CRC data.
GPIO REGISTERS
Table 35. GPIO_DIRCN
GPIO Direction (Address 0x0E)
Bit Bit Symbol Bit Description
7 Reserved -
GPIO direction control – these bits are used to control the direction of each General Purpose
Input/Outputs (GPIO) pins D0 - D6.
0 (default): Dx is an Input
x GPIO_DIRCNx
1: Dx is an Output
where 0 ≤ x ≤ 6
For example, writing a 1 to bit 6 means D6 is an Output.
(1)
(1) If D6 is used for DRDYB, then it cannot be used for GPIO.
Table 36. GPIO_DAT
GPIO Data (Address 0x0F)
Bit Bit Symbol Bit Description
7 Reserved -
Write Only - when GPIO_DIRCNx = 0
0: Dx is LO
1: Dx is HI
Read Only - when GPIO_DIRCNx = 1
0: Dx driven LO
1: Dx driven HI
x Dx
where 0 ≤ x ≤ 6
For example, writing a 0 to bit 4 means D4 is LO.
It is okay to Read the GPIOs that are configured as outputs and write to GPIOs that are configured
as inputs. Reading the GPIOs that are outputs would return the current value on those GPIOs, and
writing to the GPIOs that are inputs are neglected.
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