PIC16C745 Datasheet

IC型号：
PIC16C745
PDF描述：
8-Bit CMOS Microcontrollers with USB
文件大小：
4945.69KB
PDF页数：
165页
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PIC16C745/765

(BDndST: 1A0h, 1A4h, 1A8h, 1ACh, 1B0h, 1B4h)

W-X

UOWN

bit7

W-X

DATA0/1

U-X

鈥?/div>

U-X

鈥?/div>

W-X

DTS

W-X

BSTALL

U-X

鈥?/div>

U-X

鈥?/div>

bit0

bit 7:

R = Readable bit

W = Writable bit

U = Unimplemented bit,

read as 鈥?鈥?/div>

-n = Value at POR reset

X = Don鈥檛 care

UOWN:

USB Own. This UOWN bit determines who currently owns the buffer. The SIE writes a 0 to this

bit when it has completed a token. This byte of the BD should always be the last byte the MCU updates

when it initializes a BD. Once the BD has been assigned to the USB, the MCU should not change it in any

way.

= USB has exclusive access to the BD. The MCU should not modify the BD or buffer.

= The MCU has exclusive access to the BD. The USB ignores all other fields in the BD.

DATA0/1:

This bit defines the type of data toggle packet that was transmitted or received.

= Data 1 packet

= Data 0 packet

DTS:

Setting this bit will enable the USB to perform Data Toggle Synchronization. If a packet arrives with

an incorrect DTS, it will be ignored and the buffer will remain unchanged.

= Data Toggle Synchronization is performed

= No Data Toggle Synchronization is performed

BSTALL:

Buffer Stall. Setting this bit will cause the USB to issue a STALL handshake if a token is received

by the SIE that would use the BD in this location. The BD is not consumed by the SIE (the own bit remains

and the rest of the BD are unchanged) when a BSTALL bit is set.

bit 6:

bit 5-4:

Reserved:

Read as 鈥橷鈥?

bit 3:

bit 2:

bit 1-0:

Reserved:

Read as 鈥橷鈥?

Note:

Recommend that users not use BSF, BCF due to the dual functionality of this register.

(BDndST: 1A0h, 1A4h, 1A8h, 1ACh, 1B0h, 1B4h)

R/W-0

UOWN

bit7

R/W-X

DATA0/1

R/W-X

PID3

R/W-X

PID2

R/W-X

PID1

R/W-X

PID0

U-X

鈥?/div>

U-X

鈥?/div>

bit0

bit 7:

R = Readable bit

W = Writable bit

U = Unimplemented bit,

read as 鈥?鈥?/div>

-n = Value at POR reset

X = Don鈥檛 care

UOWN:

USB Own. This UOWN bit determines who currently owns the buffer. The SIE writes a 0 to this

bit when it has completed a token. This byte of the BD should always be the last byte the MCU updates

when it initializes a BD. Once the BD has been assigned to the USB, the MCU should not change it in any

way.

= USB has exclusive access to the BD. The MCU should not modify the BD or buffer.

= The MCU has exclusive access to the BD. The USB ignores all other fields in the BD.

DATA0/1:

This bit defines the type of data toggle packet that was transmitted or received.

= Data 1 packet

= Data 0 packet

bit 6:

bit 5-2:

PID<3:0>:

Packet Identifier. The received token PID value

bit 1-0:

Reserved:

Read as 'X'.

Note:

Recommend that users not use BSF, BCF due to the dual functionality of this register.

漏

1999 Microchip Technology Inc.

Advanced Information

DS41124A-page 69

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