參數(shù)資料
型號(hào): ZR36506
英文描述: Fast Recovery Rectifier Diodes
中文描述: 外圍芯片
文件頁(yè)數(shù): 79/99頁(yè)
文件大?。?/td> 452K
代理商: ZR36506
Zoran ZR 36506 USBV ision – Datasheet
Zoran Proprietary and Confidential
External EEPR OM
11 -9
EEPROM Control Signals
The SCL/PWR0 and SDA pins of the ZR36506 are the EEPROM control signals. The
SCL/PWR0 is used as the clock output, and the SDA signal is used as the data I/O.
If an external EEPROM does not exist (EEPROM = '0'), the ZR36506 automatically uses its
internal ROM for USB descriptors. In this case, the ZR36506 relates to hard-coding of the pins
SCL/PWR0 and PWR1 to determine the current-consumption parameter for the configuration
descriptor. The following table summarizes these two modes of operation:
Internal ROM Mode
External EEPROM Mode
EEPROM pin connected to GND.
SCL/PWR0 and PWR1 pins are hard-
coded to determine device current
consumption for Configuration-
Descriptor:
PWR1
SCL/PWR0 Current
=====
======== ======
0
0
1
1
0
1
0
1
200mA
300mA
400mA
500mA
EEPROM pin connected to 10 Kbyte
Pull-Up resistor (3.3 V to 5.0 V).
External Serial 2 K * 8 EEPROM is
connected:
SDA/EEPROM connected to Serial-Data
(SDA).
SCL/PWR0 connected to Serial-Clock
(SCL).
The following timing diagrams and table specify the EEPROM control waveforms that the
ZR36506 generates:
SCL
SDA
tSU:STA
tHD:STA
tSU:STO
Start/Stop Timings
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