
EZ-USB FX2 Technical Reference Manual v2.1 Appendix C - 34
EZ-USB FX2 Registers & Buffers
B8 1 IP Interrupt Priority (bit address-
able)
1 PS1 PT2 PS0 PT1 PX1 PT0 PX0 10000000 RW
B9 1 reserved
BA 1 EP01STAT
(1)
Endpoint 0&1 Status 0 0 0 0 0 EP1INBSY EP1OUTBSY EP0BSY 00000000 R Check EP0 & EP1 status us-
ing MOV instr.
BB 1 GPIFTRIG
(1)
see Section 15.14
Endpoint 2,4,6,8 GPIF slave
FIFO Trigger
DONE 0 0 0 0 RW EP1 EP0 10000xxx brrrrbbb RW=1 reads, RW=0 writes;
EP[1:0] = 00 EP2, = 01 EP4,
= 10 EP6, = 11 EP8
BC 1 reserved
BD 1 GPIFSGLDATH
(1)
GPIF Data H (16-bit mode only) D15 D14 D13 D12 D11 D10 D9 D8 xxxxxxxx RW efficient version(s) of their
MOVX buddies
BE 1 GPIFSGLDATLX
(1)
GPIF Data L w/ Trigger D7 D6 D5 D4 D3 D2 D1 D0 xxxxxxxx RW
BF 1 GPIFSGLDATLNOX
(1)
GPIF Data L w/ No Trigger D7 D6 D5 D4 D3 D2 D1 D0 xxxxxxxx R note READ only, this should
help you decide when to ap-
propriately use it
C0 1 SCON1
(1)
Serial Port 1 Control (bit addres-
sable)
SM0_1 SM1_1 SM2_1 REN_1 TB8_1 RB8_1 TI_1 RI_1 00000000 RW
C1 1 SBUF1
(1)
Serial Port 1 Data Buffer D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
C2 6 reserved
C8 1 T2CON Timer/Counter 2 Control (bit ad-
dressable)
TF2 EXF2 RCLK TCLK EXEN2 TR2 CT2 CPRL2 00000000 RW
C9 1 reserved
CA 1 RCAP2L Capture for Timer 2, auto-re-
load, up-counter
D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
CB 1 RCAP2H Capture for Timer 2, auto-re-
load, up-counter
D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
CC 1 TL2 Timer 2 reload L D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
CD 1 TH2 Timer 2 reload H D15 D14 D13 D12 D11 D10 D9 D8 00000000 RW
CE 2 reserved
D0 1 PSW Program Status Word (bit ad-
dressable)
CY AC F0 RS1 RS0 OV F1 P 00000000 RW
D1 7 reserved
D8 1 EICON
(1)
External Interrupt Control SMOD1 1 ERESI RESI INT6 0 0 0 01000000 RW RESI - reflects D+ / WU /
WU2 src while SUSPEND
(PCON.1), clocks off
D9 7 reserved
E0 1 ACC Accumulator (bit addressable) D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
E1 7 reserved
E8 1 EIE
(1)
External Interrupt Enable(s) 1 1 1 EX6 EX5 EX4 EI²C EUSB 11100000 RW
E9 7 reserved
F0 1 B B (bit addressable) D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
F1 7 reserved
F8 1 EIP
(1)
External Interrupt Priority Con-
trol
1 1 1 PX6 PX5 PX4 PI²C PUSB 11100000 RW
F9 7 reserved
(1)
SFRs not part of the standard 8051 architecture.
Hex Size Name Description b7 b6 b5 b4 b3 b2 b1 b0 Default Access Notes
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