MC145572APB Freescale Semiconductor, MC145572APB Datasheet - Page 86

• Manufacturer Part Number: MC145572APB
• Description: IC ISDN INTERFACE TXCVER 44-LQFP
• Manufacturer: Freescale Semiconductor
• Type: Transceiverr

Specifications of MC145572APB

• Protocol: RS232
• Voltage - Supply: 5V
• Mounting Type: Surface Mount
• Package / Case: 44-LQFP
• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Drivers/receivers: -
• Lead Free Status / Rohs Status: Not Compliant

5–14
5.3.2.3
PCP BYTE REGISTER OPERATION
Data is written to a byte register by writing two successive bytes to the PCP. The first byte must contain
the register address, write bit cleared to 0, and the address of the byte register. The second byte
contains the actual data to be written to the selected byte register (see Figure 5–16).
Data is read from a byte register by writing the pointer byte to the PCP, followed by a read of the
selected byte register from the PCP. The first byte must contain the register address, write bit set
to 1, and the address of the byte register. This is followed by a read cycle to obtain the contents of
the selected byte register (see Figure 5–16).
R/W
CS
D0
D1
D2
D3
D4
D5
D6
D7
BRA0
BRA1
BRA2
BRA3
1
1
1
0
Freescale Semiconductor, Inc.
BYTE REGISTER WRITE
For More Information On This Product,
Figure 5–16. PCP Byte Register Write Operation
Go to: www.freescale.com
BD0
BD1
BD2
BD3
BD4
BD5
BD6
BD7
MC145572
BD x
BRA x Byte Register Address Bit
X
CS
R/W
Byte Register Data Bit
Don’t Care
Chip Select
Read/Write Line
KEY
BRA0
BRA1
BRA2
BRA3
1
1
1
1
BYTE REGISTER READ
BD0
BD1
BD2
BD3
BD4
BD5
BD6
BD7
MOTOROLA