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Document #: 38-08032 Rev. *L Page 34 of 62
xxxx I²C Configuration Byte 0 DISCON 0 0 0 0 0 400KHZ xxxxxxxx
[14]
n/a
Special Function Registers (SFRs)
80 1 IOA
[13]
Port A (bit addressable) D7 D6 D5 D4 D3 D2 D1 D0 xxxxxxxx RW
81 1 SP Stack Pointer D7 D6 D5 D4 D3 D2 D1 D0 00000111 RW
82 1 DPL0 Data Pointer 0 L A7 A6 A5 A4 A3 A2 A1 A0 00000000 RW
83 1 DPH0 Data Pointer 0 H A15 A14 A13 A12 A11 A10 A9 A8 00000000 RW
84 1 DPL1
[13]
Data Pointer 1 L A7 A6 A5 A4 A3 A2 A1 A0 00000000 RW
85 1 DPH1
[13]
Data Pointer 1 H A15 A14 A13 A12 A11 A10 A9 A8 00000000 RW
86 1 DPS
[13]
Data Pointer 0/1 select 0 0 0 0 0 0 0 SEL 00000000 RW
87 1 PCON Power Control SMOD0 x 1 1 x x x IDLE 00110000 RW
88 1 TCON Timer/Counter Control
(bit addressable)
TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0 00000000 RW
89 1 TMOD Timer/Counter Mode
Control
GATE CT M1 M0 GATE CT M1 M0 00000000 RW
8A 1 TL0 Timer 0 reload L D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
8B 1 TL1 Timer 1 reload L D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
8C 1 TH0 Timer 0 reload H D15 D14 D13 D12 D11 D10 D9 D8 00000000 RW
8D 1 TH1 Timer 1 reload H D15 D14 D13 D12 D11 D10 D9 D8 00000000 RW
8E 1 CKCON
[13]
Clock Control x x T2M T1M T0M MD2 MD1 MD0 00000001 RW
8F 1 reserved
90 1 IOB
[13]
Port B (bit addressable) D7 D6 D5 D4 D3 D2 D1 D0 xxxxxxxx RW
91 1 EXIF
[13]
External Interrupt Flag(s) IE5 IE4 I²CINT USBNT 1 0 0 0 00001000 RW
92 1 MPAGE
[13]
Upper Addr Byte of MOVX
using @R0 / @R1
A15 A14 A13 A12 A11 A10 A9 A8 00000000 RW
93 5 reserved
98 1 SCON0 Serial Port 0 Control
(bit addressable)
SM0_0 SM1_0 SM2_0 REN_0 TB8_0 RB8_0 TI_0 RI_0 00000000 RW
99 1 SBUF0 Serial Port 0 Data Buffer D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
9A 1 AUTOPTRH1
[13]
Autopointer 1 Address H A15 A14 A13 A12 A11 A10 A9 A8 00000000 RW
9B 1 AUTOPTRL1
[13]
Autopointer 1 Address L A7 A6 A5 A4 A3 A2 A1 A0 00000000 RW
9C 1 reserved
9D 1 AUTOPTRH2
[13]
Autopointer 2 Address H A15 A14 A13 A12 A11 A10 A9 A8 00000000 RW
9E 1 AUTOPTRL2
[13]
Autopointer 2 Address L A7 A6 A5 A4 A3 A2 A1 A0 00000000 RW
9F 1 reserved
A0 1 IOC
[13]
Port C (bit addressable) D7 D6 D5 D4 D3 D2 D1 D0 xxxxxxxx RW
A1 1 INT2CLR
[13]
Interrupt 2 clear x x x x x x x x xxxxxxxx W
A2 1 INT4CLR
[13]
Interrupt 4 clear x x x x x x x x xxxxxxxx W
A3 5 reserved
A8 1 IE Interrupt Enable
(bit addressable)
EA ES1 ET2 ES0 ET1 EX1 ET0 EX0 00000000 RW
A9 1 reserved
AA 1 EP2468STAT
[13]
Endpoint 2,4,6,8 status
flags
EP8F EP8E EP6F EP6E EP4F EP4E EP2F EP2E 01011010 R
AB 1 EP24FIFOFLGS
[13]
Endpoint 2,4 slave FIFO
status flags
0 EP4PF EP4EF EP4FF 0 EP2PF EP2EF EP2FF 00100010 R
AC 1 EP68FIFOFLGS
[13]
Endpoint 6,8 slave FIFO
status flags
0 EP8PF EP8EF EP8FF 0 EP6PF EP6EF EP6FF 01100110 R
AD 2 reserved
AF 1 AUTOPTRSETUP
[13]
Autopointer 1&2 setup 0 0 0 0 0 APTR2INC APTR1INC APTREN 00000110 RW
B0 1 IOD
[13]
Port D (bit addressable) D7 D6 D5 D4 D3 D2 D1 D0 xxxxxxxx RW
B1 1 IOE
[13]
Port E
(NOT bit addressable)
D7 D6 D5 D4 D3 D2 D1 D0 xxxxxxxx RW
B2 1 OEA
[13]
Port A Output Enable D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
B3 1 OEB
[13]
Port B Output Enable D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
B4 1 OEC
[13]
Port C Output Enable D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
B5 1 OED
[13]
Port D Output Enable D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
B6 1 OEE
[13]
Port E Output Enable D7 D6 D5 D4 D3 D2 D1 D0 00000000 RW
B7 1 reserved
B8 1 IP Interrupt Priority (bit ad-
dressable)
1 PS1 PT2 PS0 PT1 PX1 PT0 PX0 10000000 RW
B9 1 reserved
BA 1 EP01STAT
[13]
Endpoint 0&1 Status 0 0 0 0 0 EP1INBSY EP1OUTBS
Y
EP0BSY 00000000 R
BB 1 GPIFTRIG
[13, 11]
Endpoint 2,4,6,8 GPIF
slave FIFO Trigger
DONE 0 0 0 0 RW EP1 EP0 10000xxx brrrrbbb
BC 1 reserved
BD 1 GPIFSGLDATH
[13]
GPIF Data H (16-bit mode
only)
D15 D14 D13 D12 D11 D10 D9 D8 xxxxxxxx RW
Note
13.SFRs not part of the standard 8051 architecture.
14.If no EEPROM is detected by the SIE then the default is 00000000.
Table 12. FX2LP Register Summary (continued)
Hex Size Name Description b7 b6 b5 b4 b3 b2 b1 b0 Default Access
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