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| 型号： | AD9609-80EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 20/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION AD9609 80MSPS |
| 设计资源： | AD9649/29/09 Schematics AD9649/29/09 Gerber Files |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 10 |
| 采样率（每秒）： | 80M |
| 数据接口： | 串行，SPI? |
| 输入范围： | 2 Vpp |
| 在以下条件下的电源（标准）： | 83mW @ 80MSPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD9609 |
| 已供物品： | 板 |
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AD9609
Rev. 0 | Page 27 of 32
MEMORY MAP
READING THE MEMORY MAP REGISTER TABLE
Each row in the memory map register table (see Table 17)
contains eight bit locations. The memory map is roughly
divided into four sections: the chip configuration registers
(Address 0x00 to Address 0x02); the device index and transfer
register (Address 0xFF); the program registers, including setup,
control, and test (Address 0x08 to Address 0x2A); and the
AD9609-specific customer SPI control register (Address 0x101).
Table 17 documents the default hexadecimal value for each
hexadecimal address shown. The column with the heading Bit 7
(MSB) is the start of the default hexadecimal value given. For
example, Address 0x2A, the OR/MODE select register, has a hexa-
decimal default value of 0x01. This means that in Address 0x2A,
Bits[7:1] = 0, and Bit 0 = 1. This setting is the default OR/MODE
setting. The default value results in the programmable external
MODE/OR pin (Pin 23) functioning as an out-of-range digital
output. For more information on this function and others, see the
AN-877 Application Note, Interfacing to High Speed ADCs via SPI.
This application note details the functions controlled by Register
0x00 to Register 0xFF. The remaining register, Register 0x101, is
documented in the Memory Map Register Descriptions section
that follows Table 17.
OPEN LOCATIONS
All address and bit locations that are not included in the SPI map
are not currently supported for this device. Unused bits of a valid
address location should be written with 0s. Writing to these loca-
tions is required only when part of an address location is open
(for example, Address 0x2A). If the entire address location is
open, it is omitted from the SPI map (for example, Address 0x13)
and should not be written.
DEFAULT VALUES
After the AD9609 is reset, critical registers are loaded with
default values. The default values for the registers are given in
the memory map register table (see Table 17).
Logic Levels
An explanation of logic level terminology follows:
“Bit is set” is synonymous with “bit is set to Logic 1” or
“writing Logic 1 for the bit.”
“Clear a bit” is synonymous with “bit is set to Logic 0” or
“writing Logic 0 for the bit.”
Transfer Register Map
Address 0x08 to Address 0x18 are shadowed. Writes to these
addresses do not affect part operation until a transfer command
is issued by writing 0x01 to Address 0xFF, setting the transfer bit.
This allows these registers to be updated internally and simulta-
neously when the transfer bit is set. The internal update takes
place when the transfer bit is set, and then the bit autoclears.
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