ade7518 Analog Devices, Inc., ade7518 Datasheet - Page 113

• Manufacturer Part Number: ade7518
• Description: Single-phase Energy Measurement Ic With 8052 Mcu, Rtc, And Lcd Driver
• Manufacturer: Analog Devices, Inc.

Table 129. SPI Configuration SFR 1 (SPIMOD1, 0xE8)
Bit
7 to 6
5
4
3
2
1 to 0
Address
0xED
0xEC
0xEB
0xEA
0xEF to 0xEE
0xE9 to0xE8
Mnemonic
Reserved
INTMOD
AUTO_SS
SS_EN
RxOFW
SPIR[1:0]
0
0
1
0
0
0
Default
Description
Reserved.
SPI Interrupt Mode.
INTMOD
0
1
Master Mode, SS Output Control (see Figure 95).
AUTO_SS
0
1
Slave Mode, SS Input Enable.
When this bit is set to Logic 1, the SS pin is defined as the slave select input pin for the SPI
slave interface.
Receive Buffer Overflow Write Enable.
RxOFW
0
1
Master Mode, SPI SCLK Frequency.
SPIR[1:0]
00
01
10
11
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Result
SPI interrupt is set when SPI Rx buffer is full.
SPI interrupt is set when SPI Tx buffer is empty.
Result
The SS pin is held low while this bit is cleared. This allows manual chip select
control using the SS pin.
Single Byte Read or Write. The SS pin goes low during a single byte
transmission and then returns high.
Continuous Transfer. The SS pin goes low during the duration of the
multibyte continuous transfer and then returns high.
Result
If the SPI2CRx SFR has not been read when a new data byte is received,
the new byte is discarded.
If the SPI2CRx SFR has not been read when a new data byte is received,
the new byte overwrites the old data.
Result
f
f
f
f
CORE
CORE
CORE
CORE
/8 = 512 kHz (if f
/16 = 256 kHz (if f
/32 = 128 kHz (if f
/64 = 64 kHz (if f
CORE
CORE
CORE
CORE
= 4.096 MHz).
= 4.096 MHz).
= 4.096 MHz).
= 4.096 MHz).
ADE7518