ADUC7121 Analog Devices, ADUC7121 Datasheet - Page 14

• Manufacturer Part Number: ADUC7121
• Description: Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU
• Manufacturer: Analog Devices

Specifications of ADUC7121

• Mcu Core: ARM7 TDMI
• Mcu Speed (mips): 40
• Sram (bytes): 8192Bytes
• Gpio Pins: 32
• Adc # Channels: 9

ADuC7121
Table 7. SPI Slave Mode Timing (Phase Mode = 0)
Parameter
t
t
t
t
t
t
t
t
t
t
t
t
1
2
CS
SL
SH
DAV
DSU
DHD
DF
DR
SR
SF
DOCS
SFS
CS is the CS (SPI slave select input) function of the multifunction Pin F3.
t
UCLK
= 23.9 ns. It corresponds to the 41.78 MHz internal clock from the PLL before the clock divider.
(POLARITY = 0)
(POLARITY = 1)
Description
CS to SPICLK edge
SPICLK low pulse width
SPICLK high pulse width
Data output valid after SPICLK edge
Data input setup time before SPICLK edge
Data input hold time after SPICLK edge
Data output fall time
Data output rise time
SPICLK rise time
SPICLK fall time
Data output valid after CS edge
CS high after SPICLK edge
SPICLK
SPICLK
MISO
MOSI
CS
t
DOCS
t
CS
1
t
DSU
MSB IN
2
2
t
MSB
DHD
t
SH
Figure 6. SPI Slave Mode Timing (Phase Mode = 0)
t
DF
t
DAV
2
t
2
SL
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t
BIT 6 TO BIT 1
DR
BIT 6 TO BIT 1
Min
200
1 × t
2 × t
0
UCLK
UCLK
LSB IN
t
SR
LSB
Typ
(SPIDIV + 1) × t
(SPIDIV + 1) × t
5
5
5
5
t
SF
t
SFS
UCLK
UCLK
Max
25
12.5
12.5
12.5
12.5
25
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns