- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385009 > TP3465 (National Semiconductor Corporation) TP3465 MICROWIRETM Interface Device (MID) PDF資料下載
參數(shù)資料
| 型號： | TP3465 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | TP3465 MICROWIRETM Interface Device (MID) |
| 中文描述： | TP3465 MICROWIRETM接口設備（MID） |
| 文件頁數(shù)： | 8/17頁 |
| 文件大?。?/td> | 295K |
| 代理商： | TP3465 |
Software Driver Procedures
(Continued)
4. Write to SKR to set the
div
bits to support the fastest SK
clock rate supported by the peripherals. Set
inten
e
1 if
the
uwdone
status is to set an INTerrupt to the host
processor (available only in the Non-multiplexed bus im-
plementation of TP3465, 28-pin package). The
ms
and
the
soi
bit are set to 0 upon power up and indicate that
the MID is in MICROWIRE Master mode, with SO as an
output pin as normal.
SENDING DATA TO PERIPHERALS (Normal Mode)
Assume sending 16-bit data to a MICROWIRE based device
connected to any one of CS0 to CS7.
1. Write to CS (Chip Select) register and reset the appropri-
ate bit and thus activate the corresponding CS pin.
2. Write LOW byte data to SMB (Second MICROWIRE Byte)
register and then HIGH byte data to FMB (First MICRO-
WIRE Byte) register.
3. Read the ST (Status) register and stay in a loop until
uwdone
bit is set.
4. Write to CS register and set the bit to deactivate the ap-
propriate chip select pin.
SENDING DATA TO PERIPHERALS
(Hardware Assisted Chip Select)
Assuming sending 16-bit data to dev3 connected to CS3
pin.
1. Write LOW byte data to address SMB and then HIGH
byte data to FMBD3.
2. Read the ST register and stay in a loop until
uwdone
bit
is set.
Communicating with an NSC
TP3071 COMBO II Type Device
The NSC TP3071 COMBO II device has a modified MICRO-
WIRE port. It shares a single pin (called CO/CI) for incoming
and outgoing data. The MID’s SO pin may be tied to this pin,
as shown in Figure 3, and the following steps are followed
to Read from and Write to this device. Assume that the chip
select for TP3071 is connected to CS1 pin.
TP3071
Write
Operation:
a. Initialization states:
skp1
e
1,
mwm1
e
1, and
soi
e
0
b. Data transfer options:
i. Set
cs1
bit to 0, write LOW byte to SMB, and HIGH
byte to FMB and then set
cs1
bit to 1 after
uwdone
bit
is set to 1.
OR
ii. Write LOW byte to SMB, and HIGH byte to FMBD1.
TP3071
Read
Operation:
a. Initialization states:
skp1
e
1,
mwm1
e
0, and
soi
e
0.
b. Data transfer options:
i. Set
cs1
bit to 0, write HIGH byte to FMB, wait until
uwdone
bit is set to 1 by hardware. Set
soi
bit to 1.
Write dummy LOW byte (e.g., 00h) to FMB, wait until
uwdone
bit is set to 1 by hardware. Read STATUS
from FMB address. Set
soi
to 0 and
cs1
to 1.
OR
ii. Write HIGH byte to FMBD1, wait until
uwdone
bit is set
to 1 by hardware. Set
soi
bit to 1. Write a dummy LOW
byte (e.g., 00h) to FMBD1 and wait until
uwdone
bit is
set to 1 by hardware. Read STATUS from FMBD1 ad-
dress. Set
soi
bit to 0.
Applications
The versatile TP3465 MICROWIRE Interface Device can be
used in a number of applications involving MICROWIRE pe-
ripheral devices that need to be controlled using a standard
microprocessor which only has a parallel bus structure.
ISDN TERMINAL ADAPTER
The MID can be used in ISDN terminal adapters (seeFigure
4 ) interfacing to ISDN components such as TP3420 SID, as
well as non-ISDN components such as LCD display drivers
(e.g., COP470) and serial EEPROMs (COP494). In this ap-
plication the MID signals SK, SO and SI are bussed to all
peripheral devices. The device chip selects control lines
a total of 8 in the 28-pin package are individually connected
to each of the devices. Status Interrupt from the peripherals
such as SID are connected directly to the main processor.
ANALOG OR DIGITAL LINECARDS
The MID can also be used in analog and digital (ISDN and
Non-ISDN) linecard applications (see Figure 5 ). Up to 8
MICROWIRE peripheral devices (TP3070 COMBO II, or
TP3420 SIDs, TP3410 UIDs or TP3401 DASLs) can be con-
nected to one MID device. The Interrupts from the trans-
ceivers may be wire-ORed and fed into one interrupt line of
the main processor, in which case all the devices will need
to be polled after an interrupt. The efficient interface be-
tween the MID and microprocessor allows this process to
be accomplished with minimum overhead.
In a given application, if any of the chip select pins are not
used to perform chip select for peripherals, then it may be
used as a general purpose input/output pin under software
control.
MID SUPPORTING MASTER AND SLAVE
MICROWIRE OPERATION
The MICROWIRE serial data bus is often used as a means
of inter-processor communication. The MID may be used
either as the Master of the MICROWIRE clock SK or as a
Slave to the SK clock fed via CKIN pin. Figure 6 shows an
application in which two general microprocessors communi-
cate with each other over the MICROWIRE bus. At the
same time other peripherals are also connected to the serial
bus. External handshaking between the two processors is
required before the MICROWIRE Byte data transfer is exe-
cuted by the master of the MICROWIRE bus.
8
相關PDF資料 |
PDF描述 |
|---|---|
| TP5088 | CONNECTOR ACCESSORY |
| TP5088N | CONNECTOR ACCESSORY |
| TP5088WM | CONNECTOR ACCESSORY |
| TP5089 | CONNECTOR ACCESSORY |
| TP5089N | CONNECTOR ACCESSORY |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TP3465N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:MICROWIRE⑩ Interface Device (MID) |
| TP3465V | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| TP3465V/63SN | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| TP3465V/NOPB | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| TP3-470 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA Low Voltage Step-Down Synchronous |
發(fā)布緊急采購，3分鐘左右您將得到回復。