![](http://datasheet.mmic.net.cn/370000/PD78F0138M3GK-A--9ET_datasheet_16728522/PD78F0138M3GK-A--9ET_453.png)
CHAPTER 27
μ
PD78F0134, 78F0138
User’s Manual U16228EJ2V0UD
453
27.7.3 Selecting communication mode
In the
μ
PD78F0134 and 78F0138, a communication mode is selected by inputting pulses (up to 11 pulses) to the
V
PP
pin after the dedicated flash memory programming mode is entered. These V
PP
pulses are generated by the flash
programmer.
The following table shows the relationship between the number of pulses and communication modes.
Table 27-7. Communication Modes
Standard (TYPE) Setting
Note 1
Communication Mode
Port
(COMM PORT)
Speed
(SIO CLOCK)
On Target
(CPU CLOCK)
Frequency
(Flashpro Clock)
Multiply Rate
(Multiple Rate)
Pins Used
Number
of V
PP
Pulses
3-wire serial I/O
(CSI10)
SIO-ch0
(SIO ch-0)
200 k to 2 MHz
Note 2
SO10, SI10,
SCK10
0
3-wire serial I/O with
handshake supported
(CSI10 + HS)
SIO-H/S
(SIO ch-3
+ handshake)
200 k to 2 MHz
Note 2
SO10, SI10,
SCK10,
HS/P15
3
UART
(UART0)
UART-ch0
(UART ch-0)
4800 to 38400 bps
Notes 2, 3
TxD0, RxD0
8
UART
(UART6)
UART-ch1
(UART ch-1)
4800 to 76800 bps
Notes 2, 3
TxD6, RxD6
9
UART with
handshake supported
(UART0 + HS)
UART-ch3
(UART ch-3)
4800 to 38400 bps
Notes 2, 3
Optional
2 M to 10 MHz
1.0
TxD0, RxD0,
HS/P15
11
Notes 1.
Selection items for Standard settings on Flashpro IV (TYPE settings on Flashpro III).
2.
The possible setting range differs depending on the voltage. For details, refer to the chapters of electrical
specifications.
3.
Because factors other than the baud rate error, such as the signal waveform slew, also affect UART
communication, thoroughly evaluate the slew as well as the baud rate error.
Caution When UART0 or UART6 is selected, the receive clock is calculated based on the reset command
sent from the dedicated flash programmer after the V
PP
pulse has been received.
Remark
Items enclosed in parentheses in the setting item column are the set value and set item when they differ
from those of Flashpro IV.