XA-SCC NXP Semiconductors, XA-SCC Datasheet - Page 32

• Manufacturer Part Number: XA-SCC
• Description: Cmos 16-bit Communications Microcontroller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1999 Feb 23
BHE/BLE
CMOS 16-bit communications microcontroller
NOTE: On Generic Data Reads, A0 can terminate a full clock period before A19–A1,
and therefore should not be used on some peripheral devices.
CLKOUT
D[15:0]
A[19:0]
NOTE: The processor can prefetch from one to eight words.
NOTE 2: To meet the required Data In Hold time, data should be held on the bus at least until the earliest of CS, BHE, BLE, OE goes high, or until the address changes,
whichever comes first.
CS
OE
DRIVEN BY XA
BHE/BLE
CLKOUT
D15–D0
A19–A1
NOTE 3
t
CHAV
OE
CS
A0
t
AVSL
Figure 10. Generic Memory (SRAM, ROM, Flash, etc.) Burst Code Fetch on 16 Bit Bus
Figure 9. Generic (SRAM, ROM, Flash, IO Devices, etc.) Read on 16 Bit Bus
t
CHSL
ADDRESS
t
CHAV
NOTE 3
t
AVSL
t
DIS
t
CHSL
NOTE 2
t
DIH
t
t
DIS
CHAV
ADDRESS + 2
32
t
DIS
t
CHSH
t
t
AHDR
DIH
NOTE 2
t
(NOTE 2)
DIH
t
CHAV
t
CHAH
ADDRESS + 4
(DOES NOT INCLUDE A0)
t
CHSH
t
DIS
t
DIH
SU01130
(NOTE 2)
Preliminary specification
t
OHDE
XA-SCC
DRIVEN
BY XA
SU01131