EZ801905050MOD Datasheet, PDF (11/36 Pages) Zilog, Inc. – eZ80190 Module is a compact, high-performance Ethernet module

eZ801905050MOD
eZ80190 Module Product Specification
6
Table 1. eZ80190 Module Peripheral Bus Connector Pin Identification* (Continued)
Pin # Symbol
Pull
Up/Down* Signal Direction Comments
23 A18
Bidirectional
24 A16
Bidirectional
25 A19
Bidirectional
26 GND
27 A2
Bidirectional
V_SS/Ground (0 V).
28 A1
Bidirectional
29 A11
Bidirectional
30 A12
Bidirectional
31 A4
Bidirectional
32 A20
Bidirectional
33 A5
Bidirectional
34 A17
Bidirectional
35 Reserved
36 DIS_Flash
PU 10KΩ Input
A Low disables onboard Flash memory.
Flash is enabled if DIS_Flash is not
connected; CMOS Input 3.3 V (5 V tolerant).
37 A21
Bidirectional
38
V_CC
39 A22
Bidirectional
3.3 V supply input pin.
40 A23
Bidirectional
41 CS0
Output
42 CS1
Output
43 CS2
Output
44 D0
PU 4k7Ω Bidirectional
45 D1
PU 4k7Ω Bidirectional
Notes: *External capacitive loads on RD, WR, IORQ, MREQ, D0–D7 and A0–A23 should be below 10 pF to satisfy
timing requirements for the CPU.
All unused inputs should be pulled to either V_DD or GND, depending on their inactive levels, to reduce power
consumption and to reduce noise sensitivity.
To prevent EMI, the EZ80CLK output can be deactivated via software in the eZ80190 Peripheral Power-Down
Register.
All inputs are CMOS level 3.3 V (5 V tolerant), except where otherwise noted.
PS019101-1003
PRELIMINARY
I/O Connector (JP2)