R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 1060

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77800ANBGAV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 75
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 449-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 26 Serial Sound Interface (SSI) Module
8. Mute Enabled
26.4.3
The compressed mode is used to transfer a continuous bit stream. This would typically be a
compressed bit stream which requires downstream decoding.
In streaming transfer (burst mode not enabled) there is no concept of a data word. However in
order to receive and transmit it is necessary to transfer between the serial bus and word formatted
memory. Therefore the word boundary selection is arbitrary during receive/transmit and must be
dealt with by another module. When burst mode is enabled then data bits being transmitted can be
identified by virtue of the fact that the serial clock output is only activated when there is a word to
be output and only the required number of clock pulses necessary to clock out each 32-bit word
are generated. The serial bit clock stops at a low level when SSICR.SCKP = 0, and at a high level
when SSICR.SCKP = 1. Note burst mode is only valid in the context of the SSI module being a
transmitter of data. Burst mode data cannot be received by this module.
Data is transmitted and received in blocks of 32 bits, and the first bit received/transmitted bit is bit
31 when stored in memory.
The word select pin in this mode does not act as a system word start signal as in non-compressed
mode, but instead is used to indicate that the receiver can receive another data burst, or the
transmitter can transmit another data burst.
Figures 26.18 and 26.19 show the compressed mode data transfer, with burst mode disabled, and
enabled, respectively.
Rev.1.00 Dec. 13, 2005 Page 1008 of 1286
REJ09B0158-0100
SSI_SDATA
SSI_SCK
SSI_WS
As basic sample format configuration except MUEN = 1 (TD data ignored)
Compressed Modes
0
0
0
0
1st Channel
Figure 26.17 Mute Enabled
0
0
0
0
0
0
2nd Channel
0
0
0
0
0
0
0
0