r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1335

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Bit
9
Bit Name
PDTA
Initial
Value
0
R/W
R/W
Description
Parallel Data Alignment
This bit is ignored if CPEN = 1.
If the data word length = 32, 16 or 8 then this bit has no
meaning.
This bit is applied to SSIRDR in receive mode and to
SSITDR in transmit mode.
0: Parallel data (SSITDR or SSIRDR) is left aligned
1: Parallel data (SSITDR or SSIRDR) is right aligned
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DWL = 000 (data word length: 8 bits), PDTA ignored
All data bits in SSIRDR or SSITDR are used on the
audio serial bus. Four data words are
transmitted/received in each 32-bit access. The first
data word is derived from bits 7 to 0, the second
from bits 15 to 8, the third from bits 23 to 16 and the
last data word is stored in bits 31 to 24.
DWL = 001 (data word length: 16 bits), PDTA
ignored
All data bits in SSIRDR or SSITDR are used on the
audio serial bus. Two data words are
transmitted/received in each 32-bit access. The first
data word is derived from bits 15 to 0 and the
second data word is stored in bits 31 to 16.
DWL = 010, 011, 100, 101 (data word length: 18,
20, 22 and 24 bits), PDTA = 0 (left aligned)
The data bits which are used in SSIRDR or SSITDR
are the following:
Bits 31 to (32 – number of bits having data word
length specified by DWL).
If DWL = 011 then data word length is 20 bits and
bits 31 to 12 are used of either SSIRDR or SSITDR.
All other bits are ignored or reserved.
DWL = 010, 011, 100, 101 (data word length: 18,
20, 22 and 24 bits), PDTA = 1 (right aligned)
The data bits which are used in SSIRDR or SSITDR
are the following:
Bits (number of bits having data word length
specified by DWL - 1) to 0.
If DWL = 011 then data word length is 20 bits and
bits 19 to 0 are used of either SSIRDR or SSITDR.
All other bits are ignored or reserved.
DWL = 110 (data word length: 32 bits), PDTA
ignored
All data bits in SSIRDR or SSITDR are used on the
audio serial bus.
Rev.1.00 Jan. 10, 2008 Page 1305 of 1658
26. Serial Sound Interface (SSI) Module
REJ09B0261-0100