參數(shù)資料
型號： UPD784915B
廠商： NEC Corp.
英文描述： 16-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 16位單晶片微控制器
文件頁數(shù)： 29/86頁
文件大?。?/td> 384K
代理商： UPD784915B
μ
PD784915B, 784916B
29
3.5 Real-time Output Port
A real-time output port consists of a port output latch and a buffer register (refer to
Figure 3-5
).
The function to transfer the data prepared in advance in the buffer register to the output latch when a trigger such
as a timer interrupt occurs, and output the data to an external device is called a real-time output function. A port used
in this way is called a real-time output port (RTP).
Table 3-4 shows the real-time output ports of the
μ
PD784916B.
Table 3-5 shows the trigger sources of RTPs.
Figure 3-5. Configuration of RTP
Table 3-4. Bit Configuration of RTP
Table 3-5. Trigger Sources of RTP
Trigger Source
INTCR00
INTCR01
INTCR02
INTCR13
INTCR50
INTP0
Remark
RTP
RTP0
High-order 4 bits
√
Low-order 4 bits
√
√
All 8 bits
√
√
RTP8
Bit 0
√
√
√
√
Note 1
Bits 2 and 3
√
Note 2
Notes 1.
Select one of the four trigger sources.
2.
When the real-time output port mode is set by the port mode control register 8 (PMC8), the HASW and
ROT-C signals that are set by the head amplifier switch output control register (HAPC) are directly output.
The HASW and ROT-C signals are synchronized with HSW output (TM0-CR00 coincidence signal).
However, the set signal is output immediately when the HAPC register is rewritten.
RTP
RTP0
RTP8
Remark
—
Pseudo V
SYNC
output : 1 channel (RTP80)
Head amplifier switch : 1 channel (RTP82)
Chrominance rotation signal output: 1
channel (RTP83)
Alternate
Function
Port 0
Port 8
Number of Bits of
Real-Time Output Data
4 bits
×
2 channels or
8 bits
×
1 channel
1 bit
×
1 channel and 2
bits
×
1 channel
Number of Bits That
Can Be Specified as
RTP
4-bit units
1-bit units
Buffer register
Port output latch
Port
Output trigger
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