XA-G39 NXP Semiconductors, XA-G39 Datasheet - Page 6

• Manufacturer Part Number: XA-G39
• Description: Xa 16-bit Microcontroller Family Xa 16-bit Microcontroller 32k Flash/1k Ram, Watchdog, 2 Uarts
• Manufacturer: NXP Semiconductors

Philips Semiconductors
SPECIAL FUNCTION REGISTERS
2002 Mar 13
AUXR
BCR
BTRH
BTRL
CS
DS
ES
IEH*
IEL*
IPA0
IPA1
IPA2
IPA4
IPA5
P0*
P1*
P2*
P3*
MNEMONIC
NAME
NAME
XA 16-bit microcontroller family
32K Flash/1K RAM, watchdog, 2 UARTs
EA/WAIT/
XTAL1
XTAL2
PSEN
V
PP
Auxiliary function register
Bus configuration register
Bus timing register high byte
Bus timing register low byte
Code segment
Data segment
Extra segment
Interrupt enable high byte
Interrupt enable low byte
Interrupt priority 0
Interrupt priority 1
Interrupt priority 2
Interrupt priority 4
Interrupt priority 5
Port 0
Port 1
Port 2
Port 3
NO.
PIN
32
35
21
20
DESCRIPTION
DESCRIPTION
TYPE
O
O
I
I
Program Store Enable: The read strobe for external program memory. When the microcontroller
accesses external program memory, PSEN is driven low in order to enable memory devices. PSEN is only
active when external code accesses are performed.
External Access/Wait/Programming Supply Voltage: The EA input determines whether the internal
program memory of the microcontroller is used for code execution. The value on the EA pin is latched as
the external reset input is released and applies during later execution. When latched as a 0, external
program memory is used exclusively, when latched as a 1, internal program memory will be used up to its
limit, and external program memory used above that point. After reset is released, this pin takes on the
function of bus Wait input. If Wait is asserted high during any external bus access, that cycle will be
extended until Wait is released. During EPROM programming, this pin is also the programming supply
voltage input.
Crystal 1: Input to the inverting amplifier used in the oscillator circuit and input to the internal clock
generator circuits.
Crystal 2: Output from the oscillator amplifier.
ADDRESS
ADDRESS
44C
46A
4A0
4A1
4A2
4A4
4A5
SFR
SFR
469
468
443
441
442
427
426
430
431
432
433
ENBOOT
T2EX
WM1
MSB
DW1
P2.7
AD7
33F
337
387
38F
397
39F
EA
RD
—
—
—
—
—
—
—
FMIDLE
WM0
DW0
P2.6
AD6
33E
38E
39E
336
386
396
WR
T2
—
—
—
6
BIT FUNCTIONS AND ADDRESSES
NAME AND FUNCTION
PWR_VLD
DWA1
ALEW
TxD1
PTI0
PTI1
P2.5
AD5
33D
PT0
PT1
38D
39D
335
385
395
T1
—
—
—
—
WAITD
DWA0
RxD1
P2.4
33C
ET2
AD4
38C
39C
334
384
394
T0
—
—
—
BUSD
INT1
DR1
CR1
ETI1
P2.3
ET1
AD3
33B
333
383
38B
393
39B
A3
—
—
—
—
—
—
ERI1
INT0
P2.2
BC2
DR0
CR0
EX1
AD2
33A
38A
39A
332
382
392
A2
—
DRA1
CRA1
TxD0
PRI0
PRI1
ETI0
P2.1
BC1
PX0
PX1
AD1
ET0
PT2
339
331
381
389
391
399
A1
—
DRA0
CRA0
RxD0
WRH
XA-G39
ERI0
LSB
BC0
AD0
P2.0
EX0
338
330
380
388
390
398
Preliminary data
—
RESET
VALUE
Note 1
FF
EF
FF
FF
FF
FF
00
00
00
00
00
00
00
00
00
00