Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 185)

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 12-15

12.4.18 Endpoint 3 Buffer Register (EP3BUF)

Note: This register is indetermistic on POR and retains its value on all other forms of reset.

Bits 7 to 0: EP3 Buffer (EP3BUF[7:0]). These data register bits are used for supplying data to the 64-byte EP3-IN

buffer. The CPU loads bytes into the EP3BUF buffer in preparation for sending to the host. The SIE sends these bytes

over USB in response to an IN request to EP3-IN.

12.4.19 Setup Data Buffer Register (SUDBUF)

Bits 7 to 0: Setup Data Buffer (SUDBUF[7:0]). These data register bits are used for reading data from the 8-byte

setup buffer. The SIE fills the setup buffer with SETUP bytes transmitted from the host. After successfully receiving the

SETUP transfer, the SIE ACKs the transfer and asserts the SUDAV interrupt request. When the CPU receives an SUDAV

interrupt request, it reads 8 bytes of data from this register.

SUDBUF

Setup Data Buffer Register

UADDR[4:0] = 14h

EP3BUF

Endpoint 3 Buffer Register

UADDR[4:0] = 13h

Bit # 7 6 5 4 3 2 1 0

Name SUDBUF7 SUDBUF6 SUDBUF5 SUDBUF4 SUDBUF3 SUDBUF2 SUDBUF1 SUDBUF0

Reset s s s s s s s s

Access rw rw rw rw rw rw rw rw

Bit # 7 6 5 4 3 2 1 0

Name EP3BUF7 EP3BUF6 EP3BUF5 EP3BUF4 EP3BUF3 EP3BUF2 EP3BUF1 EP3BUF0

Reset s s s s s s s s

Access rw rw rw rw rw rw rw rw

1 2 ... 180 181 182 183 184 185 186 187 188 189 190 ... 254 255

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Maxim-integrated MAXQ622 Manual do Utilizador Página 185