Samsung S3C6400X User Manual page 789

HOST INTERFACE
Mailbox operation with a bulk data
When a 32-bit mailbox is not enough to transfer information, any memory of AP(S3C6400) can be used as buffer
memory.
For example, in order to transfer a bulk data from the host to AP(S3C6400), the host first writes the data into a
memory in AP(S3C6400) by using Burst Write of the CPUIF Client. After checking the completion of Burst Write
by reading the status register (ie, STAT[1] = 0), the host writes a message into the in-mailbox.
In order to transfer a bulk data from the AP(S3C6400) to the host, AP(S3C6400) first prepares the data in its
memory and writes a message into the out-mailbox by using SFR access. The write will generate an interrupt to
the host.
Group
Protocol register Registers for mail-box
SFR Mailbox
24-12
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Table 24-1. Registers for Mailbox Interface
Operation
S3C6400X
Registers
IMBL, IMBH, OMBL, OMBH
CPUIFC_IMB, CPUIFC_OMB
RISC MICROPROCESSOR