HD64570F16 Renesas Electronics America, HD64570F16 Datasheet - Page 224

• Manufacturer Part Number: HD64570F16
• Description: IC SCA SRL COMM ADAPTER 88QFP
• Manufacturer: Renesas Electronics America

Specifications of HD64570F16

• Applications: ISDN
• Interface: Serial
• Voltage - Supply: 4.75 V ~ 5.25 V
• Package / Case: 88-QFP
• Mounting Type: Surface Mount
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -20C to 75C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

5.4.2
The transmit clock sources are shown in figure 5.30. When the transmit baud rate generator
output serves as the transmit clock, the TXC line functions as the transmit clock output line.
The receive clock is used as the transmit clock when the clock is extracted by the ADPLL or is in
bit synchronous loop mode.
In asynchronous mode, the actual bit rate is determined by the clock mode (1/1, 1/16, 1/32, or
1/64). In byte or bit synchronous mode, 1/1 clock mode is automatically selected. For details, see
section 5.2.2, MSCI Mode Register 1 (MD1).
Rev. 0, 07/98, page 208 of 453
CLK
TXC line input
Receive clock
Transmit Clock Sources
generator
baud rate
Transmit
Figure 5.30 Transmit Clock Sources
f
(TMC: 1 to 256, TXBR: 0 to 9)
BRG
f
CLK
=
TMC
f
: System clock (CLK) frequency
CLK
÷ 2
f
BR
TXBR
Transmit clock
(1/1, 1/16, 1/32 or
1/64 clock mode)