HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 140

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

Bit 7: Reserved. This bit always reads 0 and must be set to 0.
Bits 6–4 (TXCS2–TXCS0: Transmit Clock Source): Specify the transmit clock source.
Bits 3–0 (TXBR3–TXBR0: Transmitter Baud Rate): Used in conjunction with the time
constant register (TMC) to specify the baud rate of the baud rate generator in the transmitter. For
details, see section 5.6, Baud Rate Generator.
Rev. 0, 07/98, page 124 of 453
Asynchronous/Byte synchronous/Bit synchronous mode
TXCS2–TXCS0 = 0, 0, 0:
TXCS2–TXCS0 = 1, 0, 0:
is output from the TXC line.
TXCS2–TXCS0 = 1, 1, 0:
is used for using the clock extracted by the ADPLL as the transmit clock.
Other settings:
Asynchronous /Byte synchronous/Bit synchronous mode
TXBR3–TXBR0 = 0, 0, 0, 0:
TXBR3–TXBR0 = 0, 0, 0, 1:
TXBR3–TXBR0 = 0, 0, 1, 0:
TXBR3–TXBR0 = 0, 0, 1, 1:
TXBR3–TXBR0 = 0, 1, 0, 0:
TXBR3–TXBR0 = 0, 1, 0, 1:
TXBR3–TXBR0 = 0, 1, 1, 0:
TXBR3–TXBR0 = 0, 1, 1, 1:
TXBR3–TXBR0 = 1, 0, 0, 0:
TXBR3–TXBR0 = 1, 0, 0, 1:
TXBR3–TXBR0 = 1, 0, 1, 0:
TXBR3–TXBR0 = 1, 1, 1, 1:
Reserved.
Specifies the TXC line input as the transmit clock.
Specifies the internal BRG output as the transmit clock, which
Specifies the receive clock as the transmit clock. This setting
Division ratio = 1/1
Division ratio = 1/2
Division ratio = 1/4
Division ratio = 1/8
Division ratio = 1/16
Division ratio = 1/32
Division ratio = 1/64
Division ratio = 1/128
Division ratio = 1/256
Division ratio = 1/512
Reserved
Reserved