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Rev. 2.0, 11/00, page 500 of 1037
24.1.2
Block Diagram
Figure 24.1 shows a block diagram of the SCI2.
[Legend]
STAR
/256, /64, /32,
/16, /8, /4, /2
EDAR
: Starting address register
: Ending address register
SCK2
STRB
: SCI2 clock input/output pin
: SCI2 strobe signal output pin
SCR2
SCSR2
: Serial control register 2
: Serial control status register
CS
SO2
: SCI2 chip select signal input pin
: SCI2 transmit data output pin
SI2
: SCI2 receive data input pin
Internal clock
SCK2
Interrupt request
SI2
SO2
CS
STRB
SCK2
Shift register
STAR
EDAR
SCR2
SCSR2
Data buffer
(32 bytes)
Interrupt
generation
circuit
Transmit/
receive
control
circuit
Internal data bus
Figure 24.1 Block Diagram of SCI2
Содержание Hitachi H8S/2191
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