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PRELIMINARY
HOST INTERFACE
S3C6400X
RISC MICROPROCESSOR
24-4
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.
Features
Host Interface (Indirect Modem Interface) Features
z
Asynchronous indirect 16-bit SRAM-style host interface (i80)
z
Banked 16-bit protocol registers for host interface
z
Write-FIFO and Read-FIFO to support burst write/read transfer up to 1 Kbytes
z
A 32-bit in-mailbox register and a 32-bit out-mailbox register for data exchange
Functional Description
hDATAL
a 16-bit lower data
hDATAH
a 16-bit upper data
hDATA
a 32-bit data
(a) A 32-bit Protocol Register Write
Read hDATAL (ie, lower 16 bits)
Read hDATAH (ie, upper 16 bits)
Read hDATA
(b) A 32-bit Protocol Register Read
BSEL
Select Bank 8
BSEL
Select Bank 8
Figure
24-3. A 32-bit Protocol Register Access by Using Two 16-bit Read/Write
Note:
hDATAL is “Host Interface Data Low Register” and hDATAH is “Host Interface Data High Register”. For
more information refer to the Register Description section.