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21. HW Processor(HWP)&Sound DAC(SDAC)
(
Sound Play, Memory Check)
21.1. Overview
HW Processor supports following function.
•
"Sound Play" function
•
"Memory Check" function
By only command set, HW Processor works by itself. (not required CPU resource)
The features of the Sound Play are listed below.
•
EPSON High quality & High compress algorithm
Sampling Frequency: 15.625kHz
-
Bitrate: 16/24/32/40 kbps
-
•
2ch mixing play (example: voice on channel 0 and background music on channel 1)
•
Voice speed conversion (for channel 0)
75% - 125% (5% step)
-
•
Sequential play of multiple sound files
The features of the "Memory Check" functions are listed below.
•
On Chip RAM Check (read/write check algorithm or March-C algorithm)
•
On Chip Flash Check (CHECKSUM or CRC algorithm)
•
External QSPI-Flash* Check (CHECKSUM or CRC algorithm)
* the external flash memory with XIP (eXecute-In-Place) mode.
Figure 21.1.1 shows the HW Processor configuration.
HW Processor
HWPIE
CPU core
HWPTRG0
Clock generator
HWPEN
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
Interrupt
HWP1IF
control
HWP0IF
circuit
Control
circuit
RAM
(14KB)
FUNCTION, Command
Figure 21.1.1 HW Processor Configuration
Seiko Epson Corporation
Memory
Flash memory,
Check
circuit
Sound
synchronous
Decode
serial interface
circuit
(QSPI) 1 Ch.
Sound DAC
RAM
Quad
VDDQSPI
QSDIO00-03
QSPICLK0
#QSPISS0
SDACOUT_P
SDACOUT_N
21-1
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