UPD78F0411GA-GAM-AX Datasheet, PDF (418/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 16 MANCHESTER CODE GENERATOR
Figure 16-7. Format of MCG Status Register (MC0STR)
Address: FF47H After reset: 00H R
Symbol
<7>
6
5
4
3
2
1
0
MC0STR MC0TSF
0
0
0
0
0
0
0
MC0TSF
0
1
Data transmission status
• Reset signal generation
• MC0PWR = 0
• If the next transfer data is not written to MC0TX when a transmission is completed
Transmission operation in progress
Caution This flag always indicates 1 during continuous transmission. Do not initialize a
transmission operation without confirming that this flag has been cleared.
16.4 Operation of Manchester Code Generator
The Manchester code generator has the three modes described below.
• Operation stop mode
• Manchester code generator mode
• Bit sequential buffer mode
16.4.1 Operation stop mode
Transmissions are not performed in the operation stop mode. Therefore, the power consumption can be reduced.
In addition, the P32/TOH0/MCGO pin is used as an ordinary I/O port in this mode.
(1) Register description
MCG control register 0 (MC0CTL0) is used to set the operation stop mode.
To set the operation stop mode, clear bit 7 (MC0PWR) of MC0CTL0 to 0.
(a) MCG control register 0 (MC0CTL0)
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to 10H.
Address: FF4CH After reset: 10H R/W
Symbol
<7>
6
5
<4>
3
MC0CTL0 MC0PWR
0
0
MC0DIR
0
2
<1>
<0>
0
MC0OSL MC0OLV
MC0PWR
0
Operation stopped
Operation control
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User’s Manual U18698EJ1V0UD