EZ80F917050SBCG Zilog, EZ80F917050SBCG Datasheet - Page 19

• Manufacturer Part Number: EZ80F917050SBCG
• Description: BOARD ZDOTS SBC Z80ACCLAIM PLUS
• Manufacturer: Zilog
• Series: Zdots® SBCr
• Type: MCUr

Specifications of EZ80F917050SBCG

• Contents: Fully Assembled Evaluation Board
• For Use With/related Products: eZ80F91
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4671

Memory
IrDA Transceiver
PS026102-1207
Table 4. Flash Memory Programming Signals and Jumpers
Signal/Jumper
DIS_FLASH
FlashWE
JP3
F91_WE
The Zdots contains external Flash memory and the eZ80F91 connectivity ASSP contains
internal Flash memory. To allow Read/Write access to Flash memory on the Zdots, there
are two signals provided on connectors JP1 and JP2. A jumper JP3 on the module enables
programming of on-chip Flash.
There is also a signal that duplicates the function of this jumper.
states of the signals and the status of the jumper for different modes.
The external Flash memory of Zdots has an access time of 100 ns. At least five wait states
must be added to the cycle when accessing external Flash at 50 MHz clock speed. The
eZ80F91 devices on-chip Flash is faster; its minimum access time is 60 ns, which requires
only three wait states at 50 MHz.
There is 512 KB of fast SRAM on the Zdots. Access time is 12 ns, which requires one
wait-state access. The eZ80F91’s on-chip SRAM is used with zero wait states.
An onboard IrDA transceiver (Zilog ZHX1810) is connected to PD0 (TX), PD1 (RX), and
PD2 (Shutdown, R_SD). The IrDA transceiver is of the LED type 870 nm Class 1.
The receiver supply current is 90–150 µA and the transmitter supply current is 260 mA
when the LED is active. The IrDA transceiver is accessible via the IrDA controller
attached to UART0 on the eZ80F91 device. The UART0 console and the IrDA transceiver
cannot be used simultaneously.
To use the UART0 for console or to save power, the transceiver is disabled by the software
or by an off-board signal when using the proper jumper selection. The transceiver is
Function
Controls Read/Write access to Zdots for eZ80AcclaimPlus!
ASSP external Flash memory
Controls Write operations to the boot block of Zdots for
eZ80AcclaimPlus! ASSP external Flash memory
Controls Write access to eZ80F91 MCU on-chip Flash memory When IN, Write is
Controls Write access to eZ80F91 MCU on-chip Flash memory When Low, Write is
Zdots
®
SBC for eZ80AcclaimPlus!
Onboard Component Description
Product Specification
Table 4
™
Connectivity ASSP
When Low, access
is enabled
When Low, Write is
enabled
enabled
enabled
State/Status
describes the
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