Cirrus Logic Crystal CS98000 Series, Руководство пользователя

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CS98000
DS525PP1 31
Notes: 1. Pin may be used for micro-less DVD loader interface
2. H_D(15:8) pins may be reassigned as GenIOHst(7:0)
6.2 Miscellaneous Interface Pins
These pins are used for used for basic functions such
as clock and reset input. The I
2
C are used for both
master and slave mode (8-bit slave address is 0x30
for write, and 0x31 for read).
6.3 SDRAM Interface
These pins are used to interface the CS98000 with
some external SDRAM. The CS98000 can interface
with SDRAM of various size. Both 16 and 32 bit data
width is supported, but best performance is achieved
with 32 bits. Follow instructions in the following ta-
ble on how to interface any particular configuration
of SDRAM.
6.4 ROM/NVRAM Interface
This is the interface to the non-volatile memory that
contains the firmware. It could be either ROM,
NVRAM – FLASH or EEPROM - or any combina-
tion of those. This interface can also connect to
SRAM that would emulate a ROM on a development
system. The bus width is eight or 16 bits. Except for
the NVM_WE_L and NVM_OE_L pins, all these
pins are shared with the DRAM interface, which op-
erates simultaneously with the ROM/NVRAM inter-
face.
199 GPIO_15 B4U General Purpose IO[15] B
200 VSS_CORE Gnd Core Ground
201 IR_IN IS Infrared input I
202 XTLCLOCK I 27 MHz Clock In I
203 VDD_CORE Pwr Core Power 2.5V
204 SPDIF_O O4 S/PDIF Out O
205 RST_N IS Reset In I
206 MFG_TEST I (Tie to ground) I
207 VIN_FLD ID Video Input Field
208 VSS_PLL Gnd PLL Ground
Table 6. Pin assignments (Continued)
Pin Signal Name Type Description
186 SCL B
I
2
C Clock
187 SDA B
I
2
C Data
201 IR_IN I Infrared Input, from IR receiver.
202 XTLCLOCK I 27 MHz Clock Input.
205 RST_N I Reset Input, active low.
206 MFG_TEST I Manufacturing test pin, should always connect to ground.
Table 7. Miscellaneous Interface Pins