参数资料
型号: M95320-BN6
厂商: STMICROELECTRONICS
元件分类: PROM
英文描述: 4K X 8 SPI BUS SERIAL EEPROM, PDIP8
封装: PLASTIC, DIP-8
文件页数: 40/42页
文件大小: 771K
代理商: M95320-BN6
7/42
M95640, M95320
CONNECTING TO THE SPI BUS
These devices are fully compatible with the SPI
protocol.
All instructions, addresses and input data bytes
are shifted in to the device, most significant bit
first. The Serial Data Input (D) is sampled on the
first rising edge of the Serial Clock (C) after Chip
Select (S) goes Low.
All output data bytes are shifted out of the device,
most significant bit first. The Serial Data Output
(Q) is latched on the first falling edge of the Serial
Clock (C) after the instruction (such as the Read
from Memory Array and Read Status Register in-
structions) have been clocked into the device.
Figure 4. shows three devices, connected to an
MCU, on a SPI bus. Only one device is selected at
a time, so only one device drives the Serial Data
Output (Q) line at a time, all the others being high
impedance.
Figure 4. Bus Master and Memory Devices on the SPI Bus
Note: The Write Protect (W) and Hold (HOLD) signals should be driven, High or Low as appropriate.
AI03746e
Bus Master
(ST6, ST7, ST9,
ST10, Others)
SPI Memory
Device
SDO
SDI
SCK
CQD
S
SPI Memory
Device
CQD
S
SPI Memory
Device
CQD
S
CS3
CS2
CS1
SPI Interface with
(CPOL, CPHA) =
(0, 0) or (1, 1)
W
HOLD
W
HOLD
W
HOLD
RR
R
VCC
相关PDF资料
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