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參數(shù)資料
| 型號： | 73M2910L |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Microcontroller |
| 中文描述： | 微控制器 |
| 文件頁數(shù)： | 10/35頁 |
| 文件大?。?/td> | 572K |
| 代理商： | 73M2910L |
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73M2910L
Microcontroller
10
USR PROGRAMMABLE I/O
(continued)
USR4 PORT
USR4 Port Data External Address 0003h
Byte Addressable
Reset State 00h
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
USR4.7
USR4.6
USR4.5
USR4.4
USR4.3
USR4.2
USR4.1
USR4.0
Bits in this register will be asserted on the USR4(7:0) pins if the corresponding direction register bit is a 0 and if
the corresponding bit in the Chip Select Enable Register, 0005, is set to a 0. Reading this register will return
data reflecting the values of pins USR4(7:0).
USR4 I/O Port Direction (DIR4) External Address 0004h
Byte Addressable
Reset State FFh
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
DIR4.7
DIR4.6
DIR4.5
DIR4.4
DIR4.3
DIR4.2
DIR4.1
DIR4.0
This register is used to designate the USR4 pins as either inputs or outputs. If the register bit is reset to a 0, the
corresponding USR4 pin is programmed as an output that will be driven by the corresponding USR4 I/O data
register bit if the corresponding bit in the Chip Select Enable Register, 0005, is set to a 0. If the register bit is a
1, the corresponding pin will treated as an input only if the corresponding bit in register 0005 is set to a 0.
After a reset, the USR4 pins will act as chip select outputs.
USR4 Port Chip Select Enable (CSEN) External Address 0005h
Byte Addressable
Reset State FFh
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
CSEN 7
CSEN 6
CSEN 5
CSEN 4
CSEN 3
CSEN 2
CSEN 1
CSEN 0
This register is used to designate the USR4 pins as either user programmable I/Os or as chip select
(CS0B - CS7B) functions on a pin by pin basis. This feature is designed to help reduce external glue logic for
peripheral memory mapped devices. The chip select function is programmed by setting the appropriate bits in
the CSEN Register. When a chip select pin is enabled by setting the corresponding CSEN bit to a 1, all data
and direction information from registers 0003 and 0004 for this bit are ignored and the selected port becomes
an output. If the bit is reset to a 0, the pin will be treated as a normal programmable user I/O pin as defined by
registers 0003 and 0004.
The chip select pins have a defined memory map. The intent is that the outputs can be wire OR’ed together for
a flexible selection of peripheral chip selects. All chip selects will be disabled (forced to a logic 1. It is assumed
that all chip selects are active low) after the read or write is completed, and the appropriate chip select will be
enabled as the next new external addresses is asserted. After a reset, the CSB pull-up devices are all enabled,
that is, all chip select outputs are high. Users must account for this if these pins are intended to be general
purpose I/Os.
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 73M2910L-IG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| 73M2921 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Advanced Single Chip Modem |
| 73M2921-IG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Advanced Single Chip Modem |
| 73M2AR0015F | 功能描述:RES 0.0015 OHM 1% 2W 2512 制造商:cts resistor products 系列:73M2A 包裝:帶卷（TR） 零件狀態(tài):在售 電阻值:1.5 MOhms 容差:±1% 功率（W）:2W 成分:金屬薄膜 特性:電流檢測 溫度系數(shù):±100ppm/°C 工作溫度:-55°C ~ 155°C 封裝/外殼:2512（6432 公制） 供應(yīng)商器件封裝:2512 大小/尺寸:0.248" 長 x 0.126" 寬（6.30mm x 3.20mm） 高度 - 安裝（最大值）:0.043"（1.10mm） 端子數(shù):2 故障率:- 標(biāo)準(zhǔn)包裝:4,000 |
| 73M2AR001F | 功能描述:RES 0.001 OHM 1% 2W 2512 制造商:cts resistor products 系列:73M2A 包裝:帶卷（TR） 零件狀態(tài):在售 電阻值:1 MOhms 容差:±1% 功率（W）:2W 成分:金屬薄膜 特性:電流檢測 溫度系數(shù):±100ppm/°C 工作溫度:-55°C ~ 155°C 封裝/外殼:2512（6432 公制） 供應(yīng)商器件封裝:2512 大小/尺寸:0.248" 長 x 0.126" 寬（6.30mm x 3.20mm） 高度 - 安裝（最大值）:0.043"（1.10mm） 端子數(shù):2 故障率:- 標(biāo)準(zhǔn)包裝:4,000 |
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