XA-S3 Datasheet, PDF (45/52 Pages) NXP Semiconductors – XA 16-bit microcontroller 32 K/1 K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage 2.7 V.5.5 V, I2C, 2 UARTs, 16 MB address range

Philips Semiconductors
XA 16-bit microcontroller
32 K/1 K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),
I²C, 2 UARTs, 16 MB address range
Preliminary specification
XA-S3
CLKOUT
ALE
WR
Multiplexed
Address and Data
Unmultiplexed
Address
t_CHWL
t_CHWH
t_CHQZ
t_LLWL
t_WLWH
t_CHQX
t_WHQX
t_AVLL
t_LLAX
t_QVCH
t_QVWX
A4–A11 or A4–A23
DATA OUT*
t_AVWL
A0 or A1–A3, A12–A23
t_UAWH
*DATA OUT is either D0–D7 or D0–D15, depending on the bus width (8 or 16 bits).
Figure 30. External Data Memory Write Cycle
XTAL1
ALE
t_CRAR
ADDRESS BUS
SU00945
WAIT
BUS STROBE
(WRL, WRH,
RD, OR PSEN)
t_CHWTH
t_CHWTL
t_WTH
t_WTL
(The dashed line shows the strobe without WAIT.)
SU01068
Figure 31. WAIT Signal Timing
2000 Dec 01
45