參數(shù)資料
型號(hào): DS2490S
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi): Bus Controller
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PDSO24
封裝: 0.300 INCH, SO-24
文件頁(yè)數(shù): 26/51頁(yè)
文件大?。?/td> 444K
代理商: DS2490S
DS2490
32 of 50
condition. To recover from this state the USB host must send a CTL_RESET_DEVICE command; the
device will also recover with a power on reset cycle. Note that the DS2490 will accept and process a
CTL_RESET_DEVICE command if the EP0F = 1 state occurs. If EP0F = 0, no FIFO error condition
exists.
DS2490 RESULT REGISTERS Table 18
Offset
1,2
Data
0x10
value
0x11
value
0x1F
value
Notes:
1. Since Result Registers follow State Registers for interrupt transfers, the register offset starting value
shown in Table 18 for Result Registers follows the last value of Table 17 State Registers.
2. The number of RESULT RESIGTER values will vary depending on the setting of embedded
communication command bits NTF and ICP, the number of communication commands processed
since the previous EP1 polling period, or whether a 1-Wire device was detected.
DS2490 RESULT REGISTER VALUE DEFINITION Table 19
Data Value Description
Data
1-Wire Device Detect Byte
0xA5
Communication Command Error
Result
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
EOS RDP CRC
CMP
VPP
APP
SH
NRS
Bit Definitions:
EOS A value of 1 indicates that a SEARCH ACCESS with
SM = 1 ended sooner than expected reporting less ROM
ID’s than specified in the “number of devices”
parameter.
RDP A value of 1 indicates that a READ REDIRECT PAGE
WITH/CRC encountered a page that is redirected.
CRC A value of 1 indicates that a CRC error occurred when
executing one of the following commands: WRITE
SRAM PAGE, WRITE EPROM, READ CRC PROT
PAGE, or READ REDIRECT PAGE W/CRC.
CMP A value of 1 indicates an error with one of the following:
Error when reading the confirmation byte with a SET
PATH command. The WRITE EPROM command did
not program successfully. There was a difference
between the byte written and then read back with a
BYTE I/O command
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