参数资料
| 型号： | MC145572AAC |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 17/52页 |
| 文件大小： | 0K |
| 描述： | IC TRANSCEIVER ISDN 44-LQFP |
| 标准包装： | 160 |
| 类型： | 收发器 |
| 规程： | RS232 |
| 电源电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LQFP |
| 供应商设备封装： | 44-LQFP（10x10） |
| 包装： | 托盘 |
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25
MC145572EVK
NOTE 1
NTIDLRx is connected to IDLTx pin of the MC145574 S/T-Transceiver. If it is desired for an
external device to receive IDL data from the MC145574, the signal NTIDLRx must be
connected to the IDL receive input of the external device.
NOTE 2
NTIDLTx is connected to IDLRx pin of the MC145574 S/T-Transceiver. If it is desired for an
external device to receive IDL data from the MC145574, the signal NTIDLTx must be
connected to the IDL receive input of the external device.
2.6.1
NT Signal Header (JP7) Pin Descriptions
DREQ: S/T-Interface Transceiver DREQUEST.
In the TE mode, this signal is used to indicate to the MC145574 that an external device wishes to transmit
a layer 2 frame to the NT on the D-channel. Refer to the MC145574 ISDN S/T-Interface Transceiver data
sheet.
DGRANT: S/T-Interface Transceiver DGRANT.
In the TE mode, DGRANT operates as a D-channel grant or clear indication. Refer to the MC145574 ISDN
S/T-Interface Transceiver data sheet.
NTSCPEN: SCP Enable (NT U-Interface Transceiver SCP EN).
This signal, when held low, selects the Serial Control Port (SCP) for the transfer of control, status, and
data information into and out of the MC145572 U-Interface Transceiver on the NT1 side (U17).
Table 2-3. NT1 DATA Signal Header (J22) Quick Reference
Pin No.
Silkscreen
Functional Description
2 20
EVEN
GND
Ground
1
DREQ
S/T-Interface Transceiver DREQUEST
3
DGRANT
S/T-Interface Transceiver DGRANT
5
NTSCPEN
SCP Enable (NT U-Interface Transceiver)
7
STSCPEN
SCP Enable ST (ST-Interface Transceiver)
9
LTSCPEN
SCP Enable (LT U-Interface Transceiver)
11
NTSCPCLK
SCP Clock
13
NTSCPTx
SCP Transmit Output from MC145572s
15
SCPRx
SCP Receive Input to MC145572s
17
NTIRQL
Interrupt Request (NT U-Interface Transceiver)
19
NTIDLCLK
IDL Clock (NT U-Interface Transceiver)
21
NTIDLRx
IDL Receive Input (NT U-Interface Transceiver)
23
NTIDLTx
IDL Transmit Output (NT U-Interface Transceiver)
25
NTFSR
FSR Frame Sync (NT U-Interface Transceiver)
27
NTFSX
FSX Frame Sync (NT U-Interface Transceiver)
29
STIRQ
Interrupt Request ST (S/T-Interface Transceiver)
31
NTSFAR
Receive Superframe Alignment (NT U-Interface Transceiver)
33
NTSFAX
Transmit Superframe Alignment (NT U-Interface Transceiver)
35
NTFREF
Synchronized Recovered Clock Output When in MCU Mode of Operation (NT U-Interface Transceiver)
37
NTFREFO
Synchronized Recovered Clock Output When in GCI Mode of Operation (NT U-Interface Transceiver)
39
NTGTCLK
Demultiplexed Time Slot Clock Out (NT U-Interface Transceiver)
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For More Information On This Product,
Go to: www.freescale.com
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