Digi NS9215 - Manual (Page 27)

27
Pinout (265)
C H A P T E R 1
T
he NS9215 offers a connection to a 10/100 Ethernet network, as well as a
glueless connection to SDRAM, PC100 DIMM, flash, EEPROM, and SRAM memories,
and an external bus expansion module. It includes four multi-function serial ports,
one I2C channel, 12-bit Analog to Digital converter, battery backed real time clock
and an AES data encryption/decryption module. The NS215 provides up to 108
general purpose I/O (GPIO) pins and configurable power management with sleep
mode.
The Legend
Heading Description
Pin Pin number assigned for a specific I/O signal
Signal Pin name for each I/O signal. Some signals have multiple function modes and are
identified accordingly. The mode is configured through firmware using one or more
configuration registers.
_n is the signal name indicates that this signal is active is active low.
U/D U or D indicates whether the pin has an internal pullup resistor or a pulldown resistor:
U Pullup (input current source)
D Pulldown (input current sink)
If no value is listed, that pin has neither an internal pullup nor pulldown resistor.
I/O The type of signal: input (I), output (O), input/output (I/O), or power (P).
OD (mA) The output drive of an output buffer. The NS9215 uses one of two drivers:
2 mA
4 mA