EZ80F910100KIT Zilog, EZ80F910100KIT Datasheet - Page 36

• Manufacturer Part Number: EZ80F910100KIT
• Description: KIT DEV FOR EZ80F91 W/C-COMPILER
• Manufacturer: Zilog
• Series: eZ80 Acclaim!®r
• Type: MCUr

Specifications of EZ80F910100KIT

• Contents: Dev. Board, Ethernet Module, Cable, Power Supply and Software
• For Use With/related Products: eZ80F91
• For Use With: 269-4661 - KIT ACC ETHERNET SMART CABLE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3388

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Operational Description
eZ80F91 Modular Development Kit
User Manual
IrDA Transceiver
with a duration of 200 ms if the power supply drops below 2.93 V. This
reset pulse ensures that the board always starts in a defined condition. The
RESET pin on the I/O connector reflects the status of the RESET line. It
is a bidirectional pin for resetting external peripheral components or for
resetting the eZ80F91 Modular Development Kit with a low-impedance
output (e.g. a 100-Ohm push button).
The eZ80F91 Mini Enet Module is shipped without an IrDA transceiver
installed.
If you install an on-board transceiver, such as the ZiLOG ZHX1810, it is
connected to PD0 (TX), PD1 (RX), and PD2 (Shutdown, IR_SD). The
IrDA transceiver is of the LED type 870 nm Class 1.
The IrDA transceiver is accessible via the IrDA controller attached to
UART0 on the eZ80F91 device.
To use the UART0 as a console or to save power, the transceiver can be
disabled by the software or by an off-board signal when using the proper
jumper selection. The transceiver is disabled by setting PD2 (IRDA_SD)
High or by pulling the DIS_IRDA pin on the I/O connector Low. The
shutdown feature is used for power savings. To enable the IrDA trans-
ceiver, DIS_IRDA is left floating and PD2 is pulled Low.
The RxD and TxD signals on the transceiver perform the same functions
as a standard RS232 port. However, these signals are processed as IrDA
3/16 coding pulses (sometimes called IrDA encoder/decoder pulses).
When the IrDA function is enabled, the final output to the RxD and TxD
pins are routed through the 3/16 pulse generator.
Another signal that is used in the eZ80F91 Mini Enet Module’s IrDA sys-
tem is Shut_Down (SD). The SD pin is connected to PD2 on the eZ80F91
Mini Enet Module. The IrDA control software on the user’s wireless
device must enable this pin to wake the IrDA transceiver. The SD pin
must be set Low to enable the IrDA transceiver. On the eZ80F91 Mini
Enet Module, a two-input OR gate is used to allow an external pin to shut
PRELIMINARY
UM017001-0404