参数资料
型号: ISP1181BBS,518
厂商: ST-ERICSSON
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQCC48
封装: 7 X 7 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT-619-2, HVQFN-48
文件页数: 21/71页
文件大小: 351K
代理商: ISP1181BBS,518
Philips Semiconductors
ISP1181B
Full-speed USB peripheral controller
Product data
Rev. 02 — 07 December 2004
27 of 70
9397 750 13958
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
12.1.3
Write/Read Mode Register
This command is used to access the ISP1181B Mode Register, which consists of
1 byte (bit allocation: see Table 18). In 16-bit bus mode the upper byte is ignored.
The Mode Register controls the DMA bus width, resume and suspend modes,
interrupt activity and SoftConnect operation. It can be used to enable debug mode,
where all errors and Not Acknowledge (NAK) conditions will generate an interrupt.
Code (Hex): B8/B9 — write/read Mode Register
Transaction — write/read 1 byte
[1]
Unchanged by a bus reset.
Table 17:
Address Register: bit description
Bit
Symbol
Description
7
DEVEN
A logic 1 enables the device.
6 to 0
DEVADR[6:0]
This eld species the USB device address.
Table 18:
Mode Register: bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
DMAWD
reserved
GOSUSP
reserved
INTENA
DBGMOD
reserved
SOFTCT
Reset
000
Access
R/W
Table 19:
Mode Register: bit description
Bit
Symbol
Description
7
DMAWD
A logic 1 selects 16-bit DMA bus width (bus conguration modes
0 and 2). A logic 0 selects 8-bit DMA bus width.
Bus reset value: unchanged.
6
-
reserved
5
GOSUSP
Writing a logic 1 followed by a logic 0 will activate ‘suspend’
mode.
4
-
reserved
3
INTENA
A logic 1 enables all interrupts. Bus reset value: unchanged.
2
DBGMOD
A logic 1 enables debug mode. where all NAKs and errors will
generate an interrupt. A logic 0 selects normal operation, where
interrupts are generated on every ACK (bulk endpoints) or after
every data transfer (isochronous endpoints).
Bus reset value: unchanged.
1
-
reserved
0
SOFTCT
A logic 1 enables SoftConnect (see Section 7.4). This bit is
ignored if EXTPUL = 1 in the Hardware Conguration Register
(see Table 20). Bus reset value: unchanged.
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