EZ80F910100KIT Zilog, EZ80F910100KIT Datasheet - Page 34

• 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

24
Operational Description
Operational Description
eZ80F91 Modular Development Kit
User Manual
Note:
eZ80F91 Mini Enet Module Memory
With the addition of a Fast buffer, Flash turn-off time is reduced from
25 ns to 5.5 ns. Bus contention can still occur, but the amount of time it
consumes is not T
= 6.8 ns. At this faster rate, data that is being written does not become cor-
rupted because the write pulse is not yet asserted.
As of the date of publication of this document, ZiLOG has not completed
an analysis of the effect that this 6.8 ns period of bus contention has on the
design. An Application Note from
SRAM and Bus Contention further explains this bus contention issue.
The purpose of the eZ80F91 Mini Enet Module as a feature of the
eZ80F91 Modular Development Kit is to provide application developers
with a design platform that enables them to make use of such eZ80F91
device features of the as on-chip EMAC, SRAM, Flash, etc.
Static RAM
The eZ80F91 Mini Enet Module features 128 KB of fast SRAM. Access
speed is typically 12 ns, allowing zero-wait-state operation at 50 MHz.
With the CPU at 50 MHz, SRAM can be accessed with zero wait states in
eZ80 mode. CS1_CTL (CS1) can be set to
The eZ80F91 Mini Enet Module is shipped with SRAM powered from
the same power supply as the eZ80F91 device. The SRAM may also be
powered separately by battery. To power SRAM from battery:
1. Remove R15
2. Ensure that R14 is in place.
3. Connect battery (-) to GND.
4. Connect battery (+) to J10.
CON
= 26.3 ns but rather T
PRELIMINARY
Cypress Semiconductor
CON
08h
= (8.8 ns – 7.5 ns + 5.5 ns)
(no wait states).
UM017001-0404
titled NoBL