Datasheet

Universal Serial Bus Module (USB)
Technical Data MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
120 Universal Serial Bus Module (USB) Freescale Semiconductor
9.4 Pin Name Conventions
The USB share two I/O pins with two port E I/O pins. The full name of the
USB I/O pin is listed in Table 9-1. The generic pin name appear in the
text that follows.
Table 9-1. USB Module Pin Name Conventions
USB Generic Pin Names: D+ D–
Full USB Pin Names: PTE3/D+ PTE4/D–
Addr.Register Name Bit 7654321Bit 0
$0018
USB Interrupt Register 2
(UIR2)
Read: 00000000
Write: EOPFR RSTFR TXD2FR RXD2FR TXD1FR
RESUMFR
TXD0FR RXD0FR
Reset:00000000
$0019
USB Control Register 2
(UCR2)
Read:
T2SEQ STALL2 TX2E RX2E TP2SIZ3 TP2SIZ2 TP2SIZ1 TP2SIZ0
Write:
Reset:00000000
$001A
USB Control Register 3
(UCR3)
Read: TX1ST 0
OSTALL0 ISTALL0
0
PULLEN ENABLE2 ENABLE1
Write:
TX1STR
Reset:000000*00
* PULLEN bit is reset by POR or LVI reset only.
$001B
USB Control Register 4
(UCR4)
Read: 00000
FUSBO FDP FDM
Write:
Reset:00000000
$0020
USB Endpoint 0 Data
Register 0
(UE0D0)
Read: UE0R07 UE0R06 UE0R05 UE0R04 UE0R03 UE0R02 UE0R01 UE0R00
Write: UE0T07 UE0T06 UE0T05 UE0T04 UE0T03 UE0T02 UE0T01 UE0T00
Reset: Unaffected by reset
$0021
USB Endpoint 0 Data
Register 1
(UE0D1)
Read: UE0R17 UE0R16 UE0R15 UE0R14 UE0R13 UE0R12 UE0R11 UE0R10
Write: UE0T17 UE0T16 UE0T15 UE0T14 UE0T13 UE0T12 UE0T11 UE0T10
Reset: Unaffected by reset
= Unimplemented U = Unaffected by reset
Figure 9-1. USB I/O Register Summary (Sheet 1 of 4)