PXAH30KFBE,557 NXP Semiconductors, PXAH30KFBE,557 Datasheet - Page 31

• Manufacturer Part Number: PXAH30KFBE,557
• Description: IC XA MCU 16BIT CMOS 100LQFP
• Manufacturer: NXP Semiconductors
• Series: XAr

Specifications of PXAH30KFBE,557

• Core Processor: XA
• Core Size: 16-Bit
• Speed: 30MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 33
• Program Memory Size: -
• Program Memory Type: ROMless
• Eeprom Size: -
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: -
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Philips Semiconductors
1999 Sep 24
CMOS 16-bit highly integrated microcontroller
On all cycles on 8-bit bus, BHE remains high (inactive)
Note:
WARNING: Some 8-bit I/O devices (especially FIFOS) cannot operate correctly with 2 bytes being read for a one byte read. The most common (and least expensive)
solution is to operate these 8-bit devices on a 16-bit bus, and access them in software on all odd byte (or all even byte) boundaries. An added benefit of this tech-
nique is that byte reads are faster than on an 8-bit bus, because only 1 word is fetched (a single read) instead of 2 consecutive bytes.
BHE/BLE
On the external bus, ALL XA-H4 reads are 16-bit reads. If the CPU instruction only specifies 8-bits, then the CPU uses the appropriate byte, and discards the
extra byte. Thus, “8-Bit Reads” and “16-Bit Reads” appear to be identical on the bus. On an 8-bit bus, this will appear as two consecutive 8-bit reads even
though the CPU will only use one of the two bytes.
ClkOut
A19 – A1
D7 – D0
WE
CS
ClkOut
D
A
BLE
CS
OE
A0
Driven by XA
t
CHAV
t
CHDV
Figure 9. Write ( byte write on 8-bit bus, or all writes on 16-bit bus )
t
AVSL
t
AVSL
Figure 10. Read (16-Bit or 8-Bit) on 8 Bit Bus
t
Note 1
CHSL
t
CHSL
Note 3
t
DIS
t
CHSH
31
Note 2
t
CHAV
t
t
SHAH
SHDH
t
CHSH
t
DIS
Note 2
t
DIH
t
OHDE
Driven by XA
t
AHDR
SU01278
Preliminary specification
XA-H3
SU01283