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| 型号： | MAX14830ETM+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | SERIAL COMM CONTROLLER, QCC48 |
| 封装： | 7 X 7 MM, ROHS COMPLIANT, TQFN-48 |
| 文件页数： | 50/68页 |
| 文件大小： | 2356K |
| 代理商： | MAX14830ETM+ |
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MAX14830
Quad Serial UART with 128-Word FIFOs
and Internal Oscillator
54
GloblComnd—Global Command Register
Bits 7–0: GlbCom[n]
The GloblComnd register is the only global write register in the MAX14830. Every byte written to GloblComnd is sent
simultaneously to all four UARTs. Every byte sent by the SPI/I2C master to location 0x1F is interpreted as a global com-
mand by all the four internal UARTs.
The MAX14830 logic supports the following commands (Table 8):
GlobalTxSynchronization
ExtendedAddressingSpaceEnable(togetaccesstoregistersbeyondaddress0x1F)
ExtendedAddressingSpaceDisable(todisableaccesstoregistersbeyondaddress0x1F)
The last two commands (0xCE/0xCD) enable/disable the access to registers in the extended space of the register map
when MAX14830 operates in SPI mode. The SPI command byte has only 5 bits to address a given register so that the
registers beyond 0x1F could not be addressed using the standard access method.
In I2C mode, there is no need to explicitly enable and disable the extended register map access as I2C allows up to
7 bits for register addressing.
To extend the addressing capability of the SPI command byte, send a 0xCE to location 0x1F. The internal SPI address
is generated as 0010 A3A2A1A0, where A3A2A1A0 is the least significant nibble of the command byte. Bit A4 of the
command byte is disregarded when the extended space of the register map is enabled and only the least significant
nibble is used for addressing purposes (Table 9).
Bits U1 and U0 of the command byte maintain their meaning in the extended mode. See the SPI Interface section for
more information.
To return to standard addressing mode, the SPI master has to send the 0xCD command. In this case, the internal SPI
address is generated as follows (default): 000A4 A3A2A1A0
Table 8. GloblComnd Command Descriptions
Table 9. Extended Mode Addressing
(SPI only)
GloblComnd[7:0]
COMMAND DESCRIPTION
0xE0
Tx Command 0
0xE1
Tx Command 1
0xE2
Tx Command 2
0xE3
Tx Command 3
0xE4
Tx Command 4
0xE5
Tx Command 5
0xE6
Tx Command 6
0xE7
Tx Command 7
0xE8
Tx Command 8
0xE9
Tx Command 9
0xEA
Tx Command 10
0xEB
Tx Command 11
0xEC
Tx Command 12
0xED
Tx Command 13
0xEE
Tx Command 14
REGISTER
SPI MODE
ADDRESS
I2C MODE
ADDRESS
TxSynch
0x00
0x20
SynchDelay1
0x01
0x21
SynchDelay2
0x02
0x22
TIMER1
0x03
0x23
TIMER2
0x04
0x24
RevID
0x05
0x25
ADDRESS:
0x1F
MODE:
W
BIT
7
6
5
4
3
2
1
0
NAME
GlbCom7
GlbCom6
GlbCom5
GlbCom4
GlbCom3
GlbCom2
GlbCom1
GlbCom0
GloblComnd[7:0]
COMMAND DESCRIPTION
0xEF
Tx Command 15
0xCE
Enable extended register map access
0xCD
Disable extended register map access
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX14830ETM+ | 功能描述:UART 接口集成电路 Quad Serial UART w/128-Word FIFOs RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| MAX14830ETM+T | 功能描述:UART 接口集成电路 Quad Serial UART w/128-Word FIFOs RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| MAX14830EVKIT# | 功能描述:界面开发工具 MAX14830 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 |
| MAX14830EVKIT+ | 制造商:Maxim Integrated Products 功能描述:QUAD UART EV-KIT WITH IO-LINK AND MULTIPROTOCOL - Boxed Product (Development Kits) |
| MAX1483C/D+ | 功能描述:RS-485接口IC low-power transceivers for RS-485 and RS-422 communication 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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