Cypress EZ-USB FX3 User Manual

EZ-USB FX3 Technical Reference Manual, Document Number: 001-76074 Rev. *F 377
PP_RD_MAILBOX
0xE0017E4C
10.8.15 PP_RD_MAILBOX (continued)
These registers contain a message of up to 8 bytes from firmware to the Application Processor. The semantics of the possible
messages will be defined as part of the software specification. These registers also appear in the P-Port MMIO space as
PIB_RD_MAILBOX*. When firmware writes data into the high word of PIB_RD_MAILBOX the event PP_EVENT.RD_MB_-
FULL is set. The expected action is that the Application Processor reads the message and interprets it and then clears
PP_EVENT.RD_MB_FULL, which sets PIB_INTR.RD_MB_EMPTY to signal firmware for the next message (if needed).
63:0 RD_MAILBOX[63:0] Read mailbox message to AP
PP_RD_MAILBOX P-Port Read (Egress) Mailbox Registers
b7 b6 b5 b4 b3 b2 b1 b0
RD_MAILBOX[7:0]
R R R R R R R R
R/W R/W R/W R/W R/W R/W R/W R/W
0 0 0 0 0 0 0 0
Bit Name Description

Cypress EZ-USB FX3 Specifications

General

Brand	Cypress
Model	EZ-USB FX3
Category	Controller
Language	English