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参数资料
| 型号： | KSZ9021GN |
| 厂商： | Micrel Inc |
| 文件页数： | 27/53页 |
| 文件大小： | 0K |
| 描述： | TXRX ETHERNET GB GMII/MII 64-MLF |
| 标准包装： | 348 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 8/8 |
| 规程： | 千兆位以太网 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-VFQFN 裸露焊盘 |
| 供应商设备封装： | 64-QFN（8x8） |
| 包装： | 托盘 |
| 配用： | 576-3873-ND - BOARD EVALUATION FOR KSZ9021GN |
| 其它名称： | 576-3635 KSZ9021GN-ND |
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2009 Microchip Technology Inc.
DS22233A-page 33
MCP434X/436X
4.2.1
NON-VOLATILE MEMORY
(EEPROM)
This memory can be grouped into two uses of
non-volatile memory. These are:
The non-volatile wipers starts functioning below the
devices VPOR/VBOR trip point.
4.2.1.1
General Purpose Registers
These locations allow the user to store up to 5 (9-bit)
locations worth of information.
4.2.1.2
Non-Volatile Wiper Registers
These locations contain the wiper values that are
loaded into the corresponding volatile wiper register
whenever the device has a POR/BOR event. There are
four registers, one for each resistor network.
The non-volatile wiper register enables stand-alone
operation of the device (without Microcontroller control)
after being programmed to the desired value.
4.2.1.3
Factory Initialization of Non-Volatile
Memory (EEPROM)
The Non-Volatile Wiper values will be initialized to
mid-scale value. This is shown in Table 4-2.
The General purpose EEPROM memory will be
programmed to a default value of 0x000.
It is good practice in the manufacturing flow to
configure the device to your desired settings.
TABLE 4-2:
DEFAULT FACTORY
SETTINGS SELECTION
4.2.1.4
Special Features
There are 5 non-volatile bits that are not directly
mapped into the address space. These bits control the
following functions:
EEPROM Write Protect
WiperLock Technology for Non-Volatile Wiper 0
WiperLock Technology for Non-Volatile Wiper 1
WiperLock Technology for Non-Volatile Wiper 2
WiperLock Technology for Non-Volatile Wiper 3
The operation of WiperLock Technology is discussed in
Section 5.3. The state of the WL0, WL1, WL2, WL3,
and WP bits is reflected in the STATUS register (see
EEPROM Write Protect
All internal EEPROM memory can be Write Protected.
When EEPROM memory is Write Protected, Write
commands to the internal EEPROM are prevented.
Write Protect (WP) can be enabled/disabled by two
methods. These are:
External WP Hardware pin (MCP43X1 devices
only)
Non-Volatile configuration bit (WP)
High Voltage commands are required to enable and
disable the non-volatile WP bit. These commands are
shown in Section 7.9 “Modify Write Protect or
To write to EEPROM, both the external WP pin and the
internal WP EEPROM bit must be disabled. Write
Protect does not block commands to the volatile
registers.
4.2.2
VOLATILE MEMORY (RAM)
There are seven Volatile Memory locations. These are:
Volatile Wiper 0
Volatile Wiper 1
Volatile Wiper 2
Volatile Wiper 3
Status Register
Terminal Control (TCON0) Register 0
Terminal Control (TCON)1 Register 1
The volatile memory starts functioning at the RAM
retention voltage (VRAM).
Resist
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ce
Code
Ty
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a
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R
AB
Va
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e
Default
POR
Wi
p
e
rS
e
tt
in
g
Wiper
Code
W
iper
L
o
ck
T
ech
no
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a
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W
rite
Pro
tect
Settin
g
8-bit 7-bit
-502
5.0 k
Ω
Mid scale
80h
40h
Disabled
-103
10.0 k
Ω Mid scale 80h
40h
Disabled
-503
50.0 k
Ω Mid scale 80h
40h
Disabled
-104
100.0 k
Ω Mid scale 80h
40h
Disabled
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相关代理商/技术参数 |
参数描述 |
|---|---|
| KSZ9021GN TR | 功能描述:以太网 IC Gigabit Ethernet Transceiver with GMII/MII RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ9021GN-EVAL | 功能描述:以太网开发工具 Gigabit Ethernet Transceiver with GMII/MII - Evaluation Board RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
| KSZ9021GNI | 功能描述:以太网 IC Gigabit Ethernet Transceiver with GMII/MII, I-Temp RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ9021GQ | 功能描述:以太网 IC Gigabit Ethernet Transceiver with GMII/MII, Lead Free RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ9021GQI | 功能描述:以太网 IC Gigabit Ethernet Transceiver w/ GMII/MII, I-Temp RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
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