MCP3564-ESLASHST datasheet(87/108 Pages) MICROCHIP

87 / 108 page

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DS20006181C-page 87

MCP3561/2/4

8.6

IRQ Register

Name

Bits

Address

Cof

IRQ

0x5

R/W

IRQ: INTERRUPT REQUEST REGISTER

U-0

R-1

R/W-0

R/W-1

—

DR_STATUS CRCCFG_STATUS POR_STATUS

IRQ_MODE[1:0](1)

EN_FASTCMD

EN_STP

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

Unimplemented: Read as ‘0’

bit 6

DR_STATUS: Data Ready Status Flag

1 = ADCDATA has not been updated since last reading or last Reset (default)

0 = New ADCDATA ready for reading

bit 5

CRCCFG_STATUS: CRC Error Status Flag Bit for Internal Registers

1 = CRC error has not occurred for the Configuration registers (default)

0 = CRC error has occurred for the Configuration registers

bit 4

POR_STATUS: POR Status Flag

1 = POR has not occurred since the last reading (default)

0 = POR has occurred since the last reading

bit 3-2

IRQ_MODE[1:0]: Configuration for the IRQ/MDAT Pin(1)

IRQ_MODE[1]: IRQ/MDAT Selection

1 = MDAT output is selected. Only POR and CRC interrupts can be present on this pin and take priority

over the MDAT output.

0 =IRQ output is selected. All interrupts can appear on the IRQ/MDAT pin.

IRQ_MODE[0]: IRQ Pin Inactive State Selection

1 = The Inactive state is logic high (does not require a pull-up resistor to DVDD)

0 = The Inactive state is high-Z (requires a pull-up resistor to DVDD) (default)

bit 1

EN_FASTCMD: Enable Fast Commands in the COMMAND Byte

1 = Fast commands are enabled (default)

0 = Fast commands are disabled

bit 0

EN_STP: Enable Conversion Start Interrupt Output

1 = Enabled (default)

0 =Disabled

Note 1:

When IRQ_MODE[1:0] = 10 or 11, the modulator output codes (MDAT stream) are available at both the

MDAT pin and ADCDATA register (0x0).

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