UPD78F0078GK-9ET-A Renesas Electronics America, UPD78F0078GK-9ET-A Datasheet - Page 299

• Manufacturer Part Number: UPD78F0078GK-9ET-A
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0078GK-9ET-A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

15.4.3 Multi-processor transfer mode
(1) Registers to be used
Note
Caution When using UART2, stop the operation of SIO3 (bit 7 (CSIE3) of serial operation mode register 3
Remark
POW TXE2 RXE2 PS21 PS20
ER2
1
1
1
In this mode, data can be transferred to or received from two or more processors.
<1> Set the CKSEL2 register (see Figure 15-7).
<2> Set the BRGC2 register (see Figure 15-6).
<3> Set bits 7 and 6 (TRM12 and TRM02) of the TRMC2 register to 0 and 1, and set bits 3, 1, and 0 (ISMD2,
<4> Set bits 4 to 0 (PS21, PS20, CL2, SL2, and ISEM2) of the ASIM2 register (see Figure 15-3).
<5> Set bit 7 (POWER2) of the ASIM2 register to 1.
<6> Set bit 6 (TXE2) of the ASIM2 register to 1.
<7> Set bit 5 (RXE2) of the ASIM2 register to 1.
<8> Write data to TXB2.
Caution Take relationship with the other party of communication when setting the port mode register
The basic procedure of setting an operation in the multi-processor transfer mode is as follows.
The relationship between the register settings and pins is shown below.
Table 15-10. Relationship Between Register Settings and Pins (Multi-Processor Transfer Mode)
• Asynchronous serial interface mode register 2 (ASIM2)
• Asynchronous serial interface status register 2 (ASIS2)
• Baud rate generator control register 2 (BRGC2)
• Asynchronous serial interface transmit status register 2 (ASIF2)
• Clock select register 2 (CKSEL2)
• Transfer mode specification register 2 (TRMC2)
• Port mode register 3 (PM3)
• Port register 3 (P3)
Can be set as port function.
0
1
1
MPIEN2, and MPS2) (see Figure 15-8).
(CSIM3) = 0).
TRMC2: Transfer mode specification register 2, PM
P
: don’t care, ASIM2: Asynchronous serial interface mode register 2,
1
0
1
: Port output latch
and port register.
0/1
0/1
0/1
ASIM2
0/1
0/1
0/1
CL2
0/1
0/1
0/1
Data transmission is started.
SL2 ISEM2 TRM12 TRM02 ISMD2 MPIEN2 MPS2
0/1
0/1
CHAPTER 15 SERIAL INTERFACE UART2
0/1
0/1
User’s Manual U14260EJ4V0UD
0
0
0
1
1
1
TRMC2
0/1
0/1
Transmission is enabled.
Reception is enabled.
0/1
0/1
0/1
: Port mode register,
0/1
0/1
0/1
PM34 P34 PM35 P35 Operation Pin Function
Note
0
0
Note
0
0
Note
1
1
Note
Reception P34
Transmission/ TxD2
Transmission TxD2
reception
Mode
TxD2
P34/
SI3/
RxD2
RxD2
RxD2
SO3/
P35/
P35
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