XA-H3 Datasheet, PDF (20/36 Pages) NXP Semiconductors – CMOS 16-bit highly integrated microcontroller

Philips Semiconductors
CMOS 16-bit highly integrated microcontroller
Preliminary specification
XA-H3
CS5
I/O Chip or Memory
CS4
I/O Chip or Memory
CS3
I/O Chip or Memory
CS2
XA-H3
CS0
OE
A19–A0
D15–D0
CS1
BLE
BHE
WE
I/O Chip or Memory
A16–A0
D7–D0
A15–A1
D15–D0
CS
WE
OE
A16–A0
D7–D0
CS
BLE
BHE
A15–A1
D15–D0
OE
WE
ROM or Flash
128 k x 8
32 k x 16 SRAM
NOTE:
The 16-bit wide RAM does not need the A0 pin from the processor. During byte writes to the RAM, the A0 value will cause
either BLE or BHE pin to go active from the XA-H3, but not to both. For all Word Writes, Word Reads, Code Fetches, and
Byte Reads, both BLE and BHE will go active.
SU01239
Figure 4. Typical System Bus Configuration
1999 Sep 24
20