參數(shù)資料
型號(hào)： CXD3531R
英文描述： Digital Signal Driver/Timing Generator
中文描述： 數(shù)字信號(hào)驅(qū)動(dòng)器/時(shí)序發(fā)生器
文件頁(yè)數(shù)： 19/30頁(yè)
文件大?。?/td> 360K
代理商： CXD3531R
– 19 –
CXD3531R
3-3. External ROM I/F
When operating the external ROM I/F, operations start by setting the serial bus register from the host I/F. The
serial bus on the ROM side is used to access the external EEPROM that comforms to I
2
C bus. Bus protocol
conforms to I
2
C bus specifications. Also, the following restrictions are placed on the external EEPROM I/F of
this IC.
Only master operations are performed.
Standard mode and fast mode are supported. Hs mode is not supported.
Multi-master functions are not supported.
The general call address and start byte of the slave address are not generated.
C bus compatibility is not supported.
A memory address space of up to 512K bytes is supported.
Wait control by RSCL is not supported.
10-bit slave addresses are not supported.
(1) External ROM I/F clock settings
The frequency of the clock signal supplied to the external EEPROM by the RSCL pin is set using RSCL_SEL
of the serial bus control registers. Set this value based on the operating frequency of the IC as given in the
table below so that the frequency output by the RSCL pin is appropriate for the specifications of the external
EEPROM.
RSCL_SEL
00
01
10
11
Frequency formula of RSCL output
f/2
7
f/2
8
f/2
9
f/2
10
Enters operating frequency of this IC in "f" in the table.
Example)
When operating frequency is 100MHz (RSCL_SEL = 01)
100
×
10
3
/2
8
= 390.625kHz
(2) External EEPROM memory capacity setting
With this IC, slave addresses and memory addresses are generated in accordance with the memory capacity
set for the external EEPROM. The memory capacity of the external EEPROM is set using ROM_MAP of the
serial bus control registers.
ROM_MAP
00
01
10
11
Usable memory size
512K-bit (65,536
×
8-bit)
256K-bit (32,768
×
8-bit)
128K-bit (16,384
×
8-bit)
64K-bit (8,192
×
8-bit)
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CXD3536R 制造商:SONY 制造商全稱(chēng):Sony Corporation 功能描述:Digital Signal Driver/Timing Generator
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