MC68HC908BD48 Datasheet, PDF (177/290 Pages) Freescale Semiconductor, Inc – Microcontrollers

Universal Serial Bus Module (USB)
Registers
13.5.8 USB Endpoint 0 Data Registers 0 to 7 (UD0R0–UD0R7)
Address: $0030–$0037
Bit 7
6
5
4
3
2
1
Bit 0
Read: UE0RDx7 UE0RDx6 UE0RDx5 UE0RDx4 UE0RDx3 UE0RDx2 UE0RDx1 UE0RDx0
Write: UE0TDx7 UE0TDx6 UE0TDx5 UE0TDx4 UE0TDx3 UE0TDx2 UE0TDx1 UE0TDx0
Reset:
Indeterminate after reset
Figure 13-8. USB Endpoint 0 Data Registers 0 to 7 (UD0R0–UD0R7)
UE0RDx[7:0] — Endpoint 0 Receive Data Buffers
These eight 8-bit buffers are serially loaded with OUT token or
SETUP token data received over the USB’s D+ and D– lines. These
buffers are for endpoint 0.
UE0TDx[7:0] — Endpoint 0 Transmit Data Buffers
These eight 8-bit buffers are loaded by user software with data to be
sent on the USB bus on the next IN token directed at endpoint 0.
13.5.9 USB Endpoint 1/2 Data Registers 0 to 7 (UD1R0–UD1R7)
Address: $0038–$003F
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Write: UE1TDx7 UE1TDx6 UE1TDx5 UE1TDx4 UE1TDx UE1TDx2 UE1TDx1 UE1TDx0
Reset:
Indeterminate after reset
Figure 13-9. USB Endpoint 1 Data Registers 0 to 7 (UD1R0–UD1R7)
UE1TDx[7:0] — Endpoint 1/2 Transmit Data Buffers
These eight 8-bit buffers are loaded by user software with data to be
sent on the USB bus on the next IN token directed at endpoint 1 or
endpoint 2. The ENDADD bit in the USB control register 1 determines
either endpoint 1 or endpoint 2 uses these buffers.
MC68HC908BD48 — Rev. 1.0
MOTOROLA
Universal Serial Bus Module (USB)
Technical Data
177