M38039G4H-XXXHP RENESAS [Renesas Technology Corp], M38039G4H-XXXHP Datasheet - Page 55
M38039G4H-XXXHP
Manufacturer Part Number
M38039G4H-XXXHP
Description
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.M38039G4H-XXXHP.pdf
(92 pages)
- Current page: 55 of 92
- Download datasheet (2Mb)
3803 Group (Spec.H QzROM version)
Rev.1.10
REJ03B0166-0110
3. S
• Note
4. Setting serial I/O3 control register again
• Note
5.Data transmission control with referring to transmit shift
• Note
6. Transmission control when external clock is selected
• Note
When signals are output from the S
side by using an external clock in the clock synchronous serial
I/O mode, set all of the receive enable bit, the S
enable bit, and the transmit enable bit to “1” (transmit
enabled).
Set the serial I/O3 control register again after the transmission
and the reception circuits are reset by clearing both the
transmit enable bit and the receive enable bit to “0”.
After the transmit data is written to the transmit buffer register,
the transmit shift register completion flag changes from “1” to
“0” with a delay of 0.5 to 1.5 shift clocks. When data
transmission is controlled with referring to the flag after
writing the data to the transmit buffer register, note the delay.
When an external clock is used as the synchronous clock for
data transmission, set the transmit enable bit to “1” at “H” of
the S
register at “H” of the S
register completion flag
Clear both the transmit enable
bit (TE) and the receive enable
bit (RE) to “0”
Set the bits 0 to 3 and bit 6 of
the serial I/O3 control register
Set both the transmit enable bit
(TE) and the receive enable bit
(RE), or one of them to “1”
RDY3
CLK3
output of reception side
input level. Also, write data to the transmit buffer
Nov 14, 2005
CLK
input level.
Page 55 of 91
RDY3
Can be set with the
LDM instruction at
the same time
pin on the reception
RDY3
output
7. Transmit interrupt request when transmit enable bit is set
• Note
• Reason
When using the transmit interrupt, take the following
sequence.
When the transmit enable bit is set to “1”, the transmit buffer
empty flag and the transmit shift register shift completion flag
are also set to “1”. Therefore, regardless of selecting which
timing for the generating of transmit interrupts, the interrupt
request is generated and the transmit interrupt request bit is set
at this point.
1. Set the serial I/O3 transmit interrupt enable bit to “0” (dis-
2. Set the transmit enable bit to “1”.
3. Set the serial I/O3 transmit interrupt request bit to “0” after
4. Set the serial I/O3 transmit interrupt enable bit to “1”
abled).
1 or more instruction has executed.
(enabled).
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
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