XA-G39 Datasheet, PDF (6/42 Pages) NXP Semiconductors – XA 16-bit microcontroller family XA 16-bit microcontroller 32K FLASH/1K RAM, watchdog, 2 UARTs

Philips Semiconductors
XA 16-bit microcontroller family
32K Flash/1K RAM, watchdog, 2 UARTs
Preliminary data
XA-G39
MNEMONIC
PSEN
EA/WAIT/
V_PP
XTAL1
XTAL2
PIN
NO.
TYPE
NAME AND FUNCTION
32
O 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.
35
I 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.
21
I Crystal 1: Input to the inverting amplifier used in the oscillator circuit and input to the internal clock
generator circuits.
20
O Crystal 2: Output from the oscillator amplifier.
SPECIAL FUNCTION REGISTERS
NAME
DESCRIPTION
SFR
ADDRESS _MSB
BIT FUNCTIONS AND ADDRESSES
RESET
LSB ^VALUE
AUXR
BCR
BTRH
BTRL
CS
DS
ES
Auxiliary function register
Bus configuration register
Bus timing register high byte
Bus timing register low byte
Code segment
Data segment
Extra segment
IEH*
Interrupt enable high byte
IEL*
Interrupt enable low byte
44C
ENBOOT FMIDLE PWR_VLD
—
—
—
—
—
46A
—
—
— WAITD BUSD BC2 BC1 BC0 Note 1
469
DW1 DW0 DWA1 DWA0 DR1 DR0 DRA1 DRA0 FF
468
WM1 WM0 ALEW
—
CR1 CR0 CRA1 CRA0 EF
443
00
441
00
442
00
33F 33E
33D
33C 33B 33A 339
338
427
—
—
—
—
ETI1 ERI1 ETI0 ERI0
00
337 336
335
334 333 332 331 330
426
EA
—
—
ET2 ET1 EX1 ET0 EX0
00
IPA0
IPA1
IPA2
IPA4
IPA5
Interrupt priority 0
Interrupt priority 1
Interrupt priority 2
Interrupt priority 4
Interrupt priority 5
P0*
Port 0
P1*
Port 1
P2*
Port 2
P3*
Port 3
4A0
—
PT0
—
PX0
00
4A1
—
PT1
—
PX1
00
4A2
—
—
—
PT2
00
4A4
—
PTI0
—
PRI0
00
4A5
—
PTI1
—
PRI1
00
387 386
385
384 383 382 381 380
430
AD7 AD6
AD5
AD4 AD3 AD2 AD1 AD0
FF
38F 38E
38D
38C 38B 38A 389
388
431
T2EX T2
TxD1 RxD1 A3
A2
A1 WRH FF
397 396
395
394 393 392 391 390
432
P2.7 P2.6 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0 FF
39F 39E
39D
39C 39B 39A 399
398
433
RD
WR
T1
T0 INT1 INT0 TxD0 RxD0 FF
2002 Mar 13
6