XA-G3 Datasheet, PDF (8/36 Pages) NXP Semiconductors – XA 16-bit microcontroller family 32K/512 OTP/ROM/ROMless, watchdog, 2 UARTs

Philips Semiconductors
XA 16-bit microcontroller family
32K/512 OTP/ROM/ROMless, watchdog, 2 UARTs
Product specification
XA-G3
NAME
DESCRIPTION
SFR
ADDRESS _MSB
BIT FUNCTIONS AND ADDRESSES
RESET
LSB ^VALUE
357 356 355 354 353 352 351 350
SWR* Software Interrupt Request
42A
— SWR7 SWR6 SWR5 SWR4 SWR3 SWR2 SWR1 00
2C7 2C6 2C5 2C4 2C3 2C2 2C1 2C0
T2CON* Timer 2 control register
418
TF2 EXF2 RCLK0 TCLK0 EXEN2 TR2 C/T2 CP/RL2 00
2CF 2CE 2CD 2CC 2CB 2CA 2C9 2C8
T2MOD* Timer 2 mode control
419
—
— RCLK1 TCLK1 —
— T2OE DCEN 00
TH2
Timer 2 high byte
459
00
TL2
Timer 2 low byte
458
00
T2CAPH Timer 2 capture register,
45B
00
high byte
T2CAPL Timer 2 capture register,
45A
00
low byte
287 286 285 284 283 282 281 280
TCON* Timer 0 and 1 control register
410
TF1 TR1 TF0 TR0 IE1
IT1
IE0
IT0
00
TH0
Timer 0 high byte
451
00
TH1
Timer 1 high byte
453
00
TL0
Timer 0 low byte
450
00
TL1
Timer 1 low byte
452
00
TMOD Timer 0 and 1 mode control
45C GATE C/T
M1
M0 GATE C/T
M1
M0
00
28F 28E 28D 28C 28B 28A 289 288
TSTAT* Timer 0 and 1 extended status
411
—
—
—
—
— T1OE — T0OE 00
2FF 2FE 2FD 2FC 2FB 2FA 2F9 2F8
WDCON* Watchdog control register
41F PRE2 PRE1 PRE0 —
— WDRUN WDTOF — Note 6
WDL
Watchdog timer reload
45F
00
WFEED1 Watchdog feed 1
45D
x
WFEED2 Watchdog feed 2
45E
x
NOTES:
* SFRs are bit addressable.
1. At reset, the BCR register is loaded with the binary value 0000 0a11, where “a” is the value on the BUSW pin. This defaults the address bus
size to 20 bits since the XA-G3 has only 20 address lines.
2. SFR is loaded from the reset vector.
3. All bits except F1, F0, and P are loaded from the reset vector. Those bits are all 0.
4. Unimplemented bits in SFRs are X (unknown) at all times. Ones should not be written to these bits since they may be used for other
purposes in future XA derivatives. The reset value shown for these bits is 0.
5. Port configurations default to quasi-bidirectional when the XA begins execution from internal code memory after reset, based on the
condition found on the EA pin. Thus all PnCFGA registers will contain FF and PnCFGB registers will contain 00. When the XA begins
execution using external code memory, the default configuration for pins that are associated with the external bus will be push-pull. The
PnCFGA and PnCFGB register contents will reflect this difference.
6. The WDCON reset value is E6 for a Watchdog reset, E4 for all other reset causes.
7. The XA-G3 implements an 8-bit SFR bus, as stated in Chapter 8 of the XA User Guide. All SFR accesses must be 8-bit operations. Attempts to
write 16 bits to an SFR will actually write only the lower 8 bits. Sixteen bit SFR reads will return undefined data in the upper byte.
1999 Apr 07
8