UPD360 datasheet(37/221 Pages) MICROCHIP

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DS00002084C-page 37

UPD360

8.2

General Purpose I/O

A key function of the UPD360 is to manage external devices via up to sixteen PIOs. Usually this is accomplished via

host software programming of the PIOs.

In some cases the UPD360 must automatically override the PIO state in response to an error condition. Features have

been incorporated into the design to enable such operation. This is required in cases where the latency introduced by

reliance on software to affect PIO state is either or too long or not deterministic.

A PIO is configured via the respective Configure PIOx Registers (CFG_PIOx). A PIO may also be configured to assert

PIO_INT in Interrupt Status Register (INT_STS). The state of a PIO is known by reading the PIO Status Register

(PIO_STS).

A mechanism exists for multiple PIO outputs to be updated via a single register write. This is accomplished via the Con-

figure PIO Output Register (CFG_PIO_OUT). Writes to this register that change the output value of a PIO are reflected

in the DataOutput bit of the respective Configure PIOx Registers (CFG_PIOx). Likewise, writes to DataOutput in the

Configure PIOx Registers (CFG_PIOx) will update the respective bit in the Configure PIO Output Register (CFG_PI-

O_OUT).

FIGURE 8-2:

CC_INT INTERRUPT HIERARCHY

Note:

The GPO1 and GPO10 general purpose signals can only function as outputs and must be kept in a

low state coincident with de-asserting RESET_N.

Note:

GPIO0 is not available in the UPD360-C.

Note:

In Standalone DFP/UFP modes (UPD360-A/UPD360-B only), GPIOs 9-15 have alternate dedicated func-

tions, as defined in Section 3.1.1.1, "UPD360-A/UPD360-B GPIO[9:15] Functions in Standalone DFP/UFP

Modes," on page 11

CC_INT_STS[6]

CC_INT_EN[6]

CC_INT_STS[7]

CC_INT_EN[7]

CC_INT_EN[5]

Detach Detected

CC_INT_EN[4]

Attach Detected

CC_INT_STS[5]

CC_INT_STS[4]

CC_INT_EN[3]

Disconnect Detected

CC_INT_STS[3]

CC_INT_STS[1]

CC_INT_EN[1]

CC_INT_STS[2]

CC_INT_EN[2]

Connect Detected

CC_INT_EN[0]

CC_INT_STS[0]

CC2_MATCH_EN[7]

CC2_CHG_STS[7]

CC2_MATCH_EN[0]

CC2_CHG_STS[0]

CC2_MATCH_EN[7]

CC1_CHG_STS[7]

CC1_MATCH_EN[0]

CC1_CHG_STS[0]

CC_INT

(to INT_STS[0])

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