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参数资料
| 型号： | MAX3421EEHJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/28页 |
| 文件大小： | 0K |
| 描述： | IC USB PERIPH/HOST CNTRL 32TQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 控制器类型： | USB 外设控制器 |
| 接口： | USB/串行 |
| 电源电压： | 3 V ~ 3.6 V |
| 电流 - 电源： | 15mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-TQFP |
| 供应商设备封装： | 32-TQFP（5x5） |
| 包装： | 带卷 (TR) |
| 配用： | MAX3421EVKIT-1+-ND - EVAL KIT FOR MAX3421E |
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MAX3421E
USB Peripheral/Host Controller
with SPI Interface
18
Maxim Integrated
GPOUT7–GPOUT0
The SPI master controls the GPOUT3–GPOUT0 states
by writing to bit 3 through bit 0 of the IOPINS1 (R20)
register. GPOUT7–GPOUT4 states are controlled by
writing to bit 3 through bit 0 of the IOPINS2 (R21) regis-
ter. GPOUT7–GPOUT0 logic levels are referenced to
the voltage on VL. As shown in Figure 13, reading the
state of a GPOUT7–GPOUT0 bit returns the state of the
internal register bit, not the actual pin state. This is use-
ful for doing read-modify-write operations to an output
pin (such as blinking an LED), since the load on the
output pin does not affect the register logic state.
GPX
GPX is a push-pull output with a 4-way multiplexer that
selects its output signal. The logic level on GPX is refer-
enced to VL. The SPI master writes to the GPXB and
GPXA bits of PINCTL (R17) register to select one of five
internal signals as depicted in Table 5.
OPERATE: This signal goes high when the
MAX3421E is able to operate after a power-up or
RES reset. OPERATE is active when the RES input
is high and the internal power-on-reset (POR) is
not asserted. OPERATE is the default GPX output.
VBUS_DET: VBUS_DET is the VBCOMP comparator
output. This allows the user to directly monitor the
VBUS status.
BUSACT: USB BUS activity signal (active high).
This signal is active whenever there is traffic on
the USB bus. The BUSACT signal is set whenever
a SYNC field is detected. BUSACT goes low during
bus reset or after 32-bit times of J-state.
REGISTER BIT
GPOUT
WRITE
GPOUT
READ
GPOUT
PIN
Figure 13. Behavior of Read and Write Operations on
GPOUT3–GPOUT0
FULL-SPEED
TIME FRAME
1ms
FULL-SPEED
TIME FRAME
1ms
SOF
USB
PACKETS
GPX
SOF
~50%
Figure 14. GPX Output in SOF Mode
SPI
CONTROLLER
SPI
CONTROLLER
MAX3421E
MOSI
MISO
MOSI
MISO
FDUPSPI = 0 (DEFAULT)
FDUPSPI = 1
Figure 15. MAX3421E SPI Data Pins for Full-Duplex (Top) and
Half-Duplex (Bottom) Operation
Table 5. GPX Output State Due to GPXB
and GPXA Bits
GPXB
GPXA
GPX PIN OUTPUT
0
OPERATE (Default State)
0
1
VBUS_DET
1
0
BUSACT/INIRQ*
1
SOF
*
If SEPIRQ = 1.
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| MAX3421EETJ+ | 功能描述:外围驱动器与原件 - PCI USB Peripheral Controller w/SPI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| MAX3421EETJ+T | 功能描述:外围驱动器与原件 - PCI USB Peripheral Controller w/SPI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| MAX3421EVKIT-1+ | 功能描述:界面开发工具 MAX3421E/20E Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX3430CPA | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX3430CPA+ | 功能描述:RS-485接口IC Fail-Safe 1/4-Unit 3.3V Transceiver RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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