HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 36

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

1.7.5
MSCI channels 0 and 1 in the SCA are full-duplex transceivers that support asynchronous, byte-
synchronous, and bit-synchronous transmission formats. The transmit clock (figure 1.9) can be
selected independently on each channel. The selectable clock sources include the built-in baud rate
generator, external clock input, and the receive clock (figure 1.10).
Rev. 0, 07/98, page 20 of 453
TXC
line input
Receive
clock
Transmit/Receive Clock Selection
transmitting)
Baud rate
generator
(for
Figure 1.9 Transmit Clock Source
f
(TMC: 1 to 256, TXBR: 0 to 9)
BRG
=
TMC
f
÷ 2
TXBR
TXS: MSCI TX clock source register
TXCS 2 to 0
(TXS bits 6 to 4)
Transmit
100
000
110
selector
clock
* Asynchronous mode
Transmit clock
(1/1, 1/16*, 1/32*, or
1/64* clock mode)