MC68HC908LD64 Datasheet, PDF (219/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

Universal Serial Bus Module (USB)
Embedded Device Function I/O Registers
14.7.8 USB Embedded Device Endpoint 0 Data Registers (DE0D0–DE0D7)
Address: $0020–$0027
DE0D0–DE0D7
Bit 7
6
5
4
3
2
1
Bit 0
Read: DE0Rx7 DE0Rx6 DE0Rx5 DE0Rx4 DE0Rx3 DE0Rx2 DE0Rx1 DE0Rx0
Write: DE0Tx7 DE0Tx6 DE0Tx5 DE0Tx4 DE0Tx3 DE0Tx2 DE0Tx1 DE0Tx0
Reset:
Indeterminate after reset
Figure 14-20. USB Embedded Device Endpoint 0 Data Registers
(DE0D0–DE0D7)
DE0Rx[7:0] — Embedded Device Endpoint 0 Receive Data Buffer
These read-only bits are serially loaded with OUT token or SETUP
token data directed at embedded device endpoint 0. The data is
received by the D0+ and D0– pins.
DE0Tx[7:0] — Embedded Device Endpoint 0 Transmit Data Buffer
These write-only buffers are loaded by software with data to be sent
on the USB bus on the next IN token directed at embedded device
endpoint 0.
14.7.9 USB Embedded Device Endpoint 1/2 Data Registers (DE1D0–DE1D7)
Address: $0028–$002F
DE1D0–DE1D7
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Write: DE1Tx7 DE1Tx6 DE1Tx5 DE1Tx4 DE1Tx3 DE1Tx2 DE1Tx1 DE1Tx0
Reset:
Indeterminate after reset
Figure 14-21. USB Embedded Device Endpoint 1/2 Data Registers
(DE1D0–DE1D7)
DE1Tx[7:0] — Embedded Device Endpoint 1/ Endpoint 2 Transmit Data
Buffer
These write-only buffers are loaded by software with data to be sent
on the USB bus on the next IN token directed at endpoint 1 or
endpoint 2 of the embedded device. These buffers are shared by
embedded device endpoints 1 and 2 and depend on proper
configuration of the ENDADD bit.
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor
Universal Serial Bus Module (USB)
Data Sheet
219