Cypress EZ-USB FX3 User Manual

EZ-USB FX3 Technical Reference Manual, Document Number: 001-76074 Rev. *F 370
PP_WR_MAILBOX
0xE0017E34
10.8.10 PP_WR_MAILBOX (continued)
These registers contain a message of up to 8 bytes from the Application Processor to firmware. The semantics of the possible
messages is defined as part of the software specification. These registers also appear in the P-Port MMIO space as
PIB_WR_MAILBOX. When the Application Processor writes data into the high word of PP_WR_MAILBOX the interrupt
PIB_INTR.WR_MB_FULL is set. The expected action is that firmware reads the message and then clears PIB_INTR.WR_M-
B_FULL, which will set PP_EVENT.WR_MB_EMPTY to signal AP for the next message (if needed).
63:0 WR_MAILBOX[63:0] Write mailbox message from AP
PP_WR_MAILBOX P-Port Write (Ingress) Mailbox Registers
b7 b6 b5 b4 b3 b2 b1 b0
WR_MAILBOX[7:0]
R/W R/W R/W R/W R/W R/W R/W R/W
R R R R R R R R
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