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參數(shù)資料
| 型號： | MAX3420EETG+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/22頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC USB PERIPH CONTROLLER 24TQFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 75 |
| 控制器類型： | USB 外設(shè)控制器 |
| 接口： | USB/串行 |
| 電源電壓： | 3 V ~ 3.6 V |
| 電流 - 電源： | 15mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-WFQFN 裸露焊盤 |
| 供應商設(shè)備封裝： | 24-TQFN-EP（4x4） |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1407 (CN2011-ZH PDF) |
| 配用： | MAX3420EEVKIT-2+-ND - EVAL KIT FOR MAX3420E |
Register Description
The SPI master controls the MAX3420E by reading and
writing 21 registers (Table 1). For a complete descrip-
tion of register contents, please refer to the “MAX3420E
Programming Guide.” A register access consists of the
SPI master first writing an SPI command byte, followed
by reading or writing the contents of the addressed
register. All SPI transfers are MSB first. The command
byte contains the register address, a direction bit (read
= 0, write = 1), and the ACKSTAT bit (Figure 4). The SPI
master addresses the MAX3420E registers by writing
the binary value of the register number in the Reg4
through Reg0 bits of the command byte. For example,
to access the IOPINS (R20) register, the Reg4 through
Reg0 bits would be as follows: Reg4 = 1, Reg3 = 0,
Reg2 = 1, Reg1 = 0, Reg0 = 0. The DIR (direction) bit
determines the direction for the data transfer. DIR = 1
means the data byte(s) will be written to the register,
and DIR = 0 means the data byte(s) will be read from
the register. The ACKSTAT bit sets the ACKSTAT bit in
the EPSTALLS (R9) register. The SPI master sets this
bit to indicate that it has finished servicing a CONTROL
transfer. Since the bit is frequently used, having it in the
SPI command byte improves firmware efficiency. In SPI
full-duplex mode, the MAX3420E clocks out eight USB
status bits as the command byte is clocked in (Figure
5). In half-duplex mode, these status bits are accessed
in the normal way, as register bits.
USB Peripheral Controller
with SPI Interface
Pin Description (continued)
PIN
TQFN-EP
LQFP
NAME
INPUT/
OUTPUT
FUNCTION
17
22, 23
VCC
Input
USB Transceiver Power-Supply Input. Connect VCC to a positive 3.3V power
supply. Bypass VCC to ground with a 1.0μF ceramic capacitor as close to the
VCC pin as possible.
18
24
VBCOMP
Input
VBUS Comparator Input. VBCOMP is internally connected to a voltage
comparator to allow the SPI master to detect (through an interrupt or checking a
register bit) the presence or loss of power on VBUS. Bypass VBCOMP to ground
with a 1.0μF ceramic capacitor.
19
26
XI
Input
Crystal Oscillator Input. Connect XI to one side of a parallel resonant 12MHz
±0.25% crystal and a capacitor to GND. XI can also be driven by an external
clock referenced to VCC.
20
27
XO
Output
Crystal Oscillator Output. Connect XO to the other side of a parallel resonant
12MHz ±0.25% crystal and a capacitor to GND. Leave XO unconnected if XI is
driven with an external source.
21
29
GPIN0
22
30
GPIN1
23
31
GPIN2
24
32
GPIN3
Input
General-Purpose Inputs. GPIN3–GPIN0 are connected to VL with internal pullup
resistors. GPIN3–GPIN0 logic levels are referenced to the voltage on VL. The
SPI master samples GPIN3–GPIN0 states by reading bit 7 through bit 4 of the
IOPINS (R20) register. Writing to these bits has no effect.
—
9, 16, 25,
28
N.C.
—
No Internal Connection
—
EP
Input
Exposed Paddle (TQFN only). Connect EP to GND.
Figure 4. SPI Command Byte
b7
b6
b5
b4
b3
b2
b1
b0
Reg4
Reg3
Reg2
Reg1
Reg0
0
DIR
ACKSTAT
Figure 5. USB Status Bits Clocked Out as First Byte of Every Transfer (Full-Duplex Mode Only)
b7
b6
b5
b4
b3
b2
b1
b0
SUSPIRQ
URESIRQ
SUDAVIRQ
IN3BAVIRQ
IN2BAVIRQ
OUT1DAVIRQ
OUT0DAVIRQ
IN0BAVIRQ
MAX3420E
Maxim Integrated
5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3420EETG+ | 功能描述:外圍驅(qū)動器與原件 - PCI USB Peripheral Controller w/SPI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| MAX3420EETG+T | 功能描述:外圍驅(qū)動器與原件 - PCI USB Peripheral Controller w/SPI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| MAX3420EETG-T | 功能描述:外圍驅(qū)動器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| MAX3420EEVKIT | 制造商:Maxim Integrated Products 功能描述:MAX3420E EVAL KIT - Bulk |
| MAX3420EEVKIT-2+ | 功能描述:界面開發(fā)工具 MAX3420E Eval Kit RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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