UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 187

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

10.3 Registers Controlling Real-Time Output Port
The following seven types of registers control the real-time output ports.
• Port mode register 3 (PM3)
• Real-time output port mode register 0, 1 (RTPM00, RTPM01)
• Real-time output port control register 0, 1 (RTPC00, RTPC01)
• DC control register 0, 1 (DCCTL0, DCCTL1)
(1) Port mode register 3 (PM3)
(2) Real-time output port mode register 0 (RTPM00)
Caution When using a port as a real-time output port, set the port in the output mode (by clearing the
This register sets the input/output mode of port 3 pins (P30 to P37) that function alternately as real-time output
pins (RTP0 to RTP7). To use port 3 as a real-time output port, the input/output mode of the port pins used
as real-time output port pins must be set in the output mode (PM3n = 0: n = 0 to 7).
PM3 is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to FFH.
This register sets the real-time output port mode or port mode in 1-bit units.
The output is RTP0 to RTP7.
RTPM00 is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
RTPM00
Symbol
Symbol
PM3
corresponding bit of port mode register 3 (PM3) to 0).
PM37 PM36 PM35 PM34
PM3n
RTPM007 RTPM006 RTPM005 RTPM004
RTPM00n
7
0
1
7
0
1
Figure 10-5. Format of Real-Time Output Port Mode Register 0
Output mode (output buffer on)
Input mode (output buffer off)
Port mode
Real-time output port mode
6
6
Real-time output port selection (n = 0 to 7)
P3n pin I/O mode selection (n = 0 to 7)
Figure 10-4. Format of Port Mode Register 3
5
5
CHAPTER 10 REAL-TIME OUTPUT PORT
4
4
PM33
RTPM003
User’s Manual U13029EJ7V1UD
3
3
RTPM002 RTPM001 RTPM000
PM32 PM31 PM30
2
2
1
1
0
0
Address
FF23H
Address
FF86H
After reset
After reset
FFH
00H
R/W
R/W
R/W
R/W
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