NEC switch - Manual (Page 102)

CHAPTER 8 USB FUNCTION
User’s Manual U12978EJ3V0UD
102
(3) Receive token bank
(a) Receive token PID (USBRTP)
This is the receive token packet ID area. The data input to the token PID compare register (TIDCMP) is
stored here.
USBRTP is read with an 8-bit memory manipulation instruction.
RESET input sets USBRTP to 00H.
(b) Receive token address L and H (USBRAL and USBRAH)
This stores the token packet to be transferred from the host. USBRAL and USBRAH consist of 16 bits.
Bits 0 to 6 of USBRAL store the data input to the token address compare register (ADRCMP).
Both USBRAL and USBRAH are read with an 8-bit memory manipulation instruction.
RESET input sets these registers to 00H.
Figure 8-4. Configuration of Receive Token Bank
00H
07H 06H 05H 04H 03H 02H 01H 00H
01H
02H
USBRTP
USBRAL
USBRAH
USBPOW address
USBPOB address
Symbol
ID area
Address area
Endpoint
area
Endpoint area Fixed to 0