M306V5EESP Mitsubishi, M306V5EESP Datasheet - Page 165

• Manufacturer Part Number: M306V5EESP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

Rev. 1.0
2.15 H
Figure 2.15.1 H
Figure 2.15.2 H
The synchronous signal counter counts H
count source.
The count value in a certain time (T time; 1024 s, 2048 s, 4096 s and 8192 s) divided system clock f
is stored into the 8-bit latch.
Accordingly, the latch value changes in the cycle of T time. When the count value exceeds “FF
is stored into the latch.
The latch value can be obtained by reading out the H
and count update cycle (T time) are selected by bits 0, 3 and 4 of the H
Figure 2.15.1 shows the H
diagram.
Note: When using the H
SYNC
input pins for input.
System clock f
Counter
SYNC
SYNC
HC1/P3
HC0/P3
H
SYNC
b7 b6 b5 b4 b3 b2 b1 b0
32
counter register
counter block diagram
5
4
Selection gate : connected to black
counter register
SYNC
SYNC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
Freguency divider
counter, set the port direction register corresponding to the H
counter and Figure 2.15.2 shows the synchronous signal counter block
HCC0
side when reset.
Note: When HC0 and HC1 input are positive polarity (negetive polarity),
Bit symbol
Nothing is assigned. In an attempt to write to this bit, write “0.”
The value, if read, turns out to be “0.”
Nothing is assigned. In an attempt to write to these bits, write “0.”
The value, if read, turns out to be “0.”
HCC0
HCC1
HCC4
HCC3
Symbol
HIGH width (LOW width) needs 3 main clock cycles or more of system clock.
HC
Polarity switch
SYNC
HCC1
Input polarity
switch bit
Count source switch bit
Count freguency
selection bits
from H
Bit name
1024 s
2048 s
4096 s
8192 s
SYNC
SYNC
counter latch (address 027F
Address
027E
b4 b3 <Count freguency>
count input pins (HC0/P7
16
HCC3, HCC4
0 : HC0/P3
1 : HC1/P3
0 :
1 :
0 0 : 1024 s
0 1 : 2048 s
1 0 : 4096 s
1 1 : 8192 s
(Rising edge count)
(Falling edge count)
4
5
and ON-SCREEN DISPLAY CONTROLLER
pin input
pin input
Function
8-bit counter
Latch (8 bits)
SYNC
XXX00X00
When reset
MITSUBISHI MICROCOMPUTERS
Reset
M306V5ME-XXXSP
counter register.
16
R
M306V5EESP
16
W
5
). A count source
, HC1/P7
Counter
H
counter latch
Data bus
SYNC
SYNC
16
,” “FF
7
) as a
count
16
32
”
165