82P33810_16 Datasheet, PDF (7/13 Pages) Integrated Device Technology – Synchronization Management Unit for IEEE 1588 and Synchronous Ethernet

82P33810 Short Form Datasheet
Table 1: Pin Description (Continued)
Pin No.
J9
B11
C11
D9
Name
I/O
Type
Description
INT_REQ
MPU_MODE1/
I2CM_SCL
MPU_MODE0/
I2CM_SDA
O
Tri-state
I/O
pull-down
Microprocessor Interface
CMOS
INT_REQ: Interrupt Request
This pin is used as an interrupt request.
MPU_MODE[1:0]: Microprocessor Interface Mode Selection
During reset, these pins determine the default value of the MPU_SEL_CNFG[1:0] bits as fol-
lows:
00: I2C mode
CMOS/
Open Drain
01: SPI mode
10: UART mode
11: I2C master (EEPROM) mode
I2CM_SCL: Serial Clock Line
In I2C master mode, the serial clock is output on this pin.
I2CM_SDA: Serial Data Input for I2C Master Mode
In I2C master mode, this pin is used as the for the serial data.
SDI: Serial Data Input
In Serial mode, this pin is used as the serial data input. Address and data on this pin are seri-
ally clocked into the device on the rising edge of SCLK.
SDI/I2C_AD2/
I
UART_RX pull-down
CMOS
I2C_AD2: Device Address Bit 2
In I2C mode, I2C_AD[2:0] pins are the address bus of the microprocessor interface.
UART_RX
In UART mode, this pin is used as the receive data (UART Receive)
CLKE: SCLK Active Edge Selection
In Serial mode, this pin is an input, it selects the active edge of SCLK to update the SDO:
E5
CLKE/I2C_AD1
I
pull-down
CMOS
High - The falling edge;
Low - The rising edge.
I2C_AD1: Device Address Bit 1
In I2C mode, I2C_AD[2:0] pins are the address bus of the microprocessor interface.
CS: Chip Selection
In Serial modes, this pin is an input.A transition from high to low must occur on this pin for
C8
CS/I2C_AD0
I
pull-up
CMOS ^{each read or write operation and this pin should remain low until the operation is over.}
I2C_AD0: Device Address Bit 0
In I2C mode, I2C_AD[2:0] pins are the address bus of the microprocessor interface.
SCLK: Shift Clock
In Serial mode, a shift clock is input on this pin.
Data on SDI is sampled by the device on the rising edge of SCLK. Data on SDO is updated
D10
SCLK/I2C_SCL
I
CMOS on the active edge of SCLK. The active edge is determined by the CLKE.
I2C_SCL: Serial Clock Line
In I2C mode, the serial clock is input on this pin.
SDO: Serial Data Output
In Serial mode, this pin is used as the serial data output. Data on this pin is serially clocked
out of the device on the active edge of SCLK.
C5
SDO/I2C_SDA/
UART_TX
I/O
CMOS/
Open Drain
I2C_SDA: Serial Data Input/Output
In I2C mode, this pin is used as the input/output for the serial data.
UART_TX:
In UART mode, this pin is used as the transmit data (UART Transmit)
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7
Revision 6, March 29, 2016