m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 206

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

3. APPENDIX
Fig. 3.3.23 Structure of Zero cross detection control register
Fig. 3.3.24 Structure of Interrupt edge selection register
192
Interrupt edge selection register
Zero cross detection control register
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
Note :
b
0
1
2
3
4
5
6
7
B
0
1
2
3
4
5
6
7
Interrupt edge selecton reigster (INTEDGE) [Address:3A
Zero cross detection control register (ZCRCON) [Address:39
INT
bit
INT
selection bit
INT
bit
INT
bit
INT
bit
INT
switch bit
CNTR
bit
CNTR
bit
Zero cross detection ON/OFF
Nothing is allocated for this bit. It is a write disabled bit.
When this bit is read out, the value is "0."
Noise filter sampling
clock selection bits
(INT
One-sided/both-sided edge
detection selection bit
Nothing is allocated for these bits. These are write disabled bits.
When these bits are read out, the values are "0."
Zero cross detection circuit
input bit (read-only)
selection bit
0
1
2
3
4
4
When the noise filter sampling clock selection bits (bits 2 and 3) of the Zero
cross detection control register (ZCRCON) (Address: 39
no noise filter is used), the both-sided edge detection function is not available.
1
/ZCR interrupt edge
/A-D conversion interrupt
interrupt edge selection
interrupt edge selection
interrupt edge selection
interrupt edge selection
)
0
1
pin active edge switch
pin active edge switch
Name
3819 Group USER’S MANUAL
Name
b3 b2
0 : Falling edge active
1 : Rising edge active
0 : Falling edge active
1 : Rising edge active
0 : Falling edge active
1 : Rising edge active
0 : Falling edge active
1 : Rising edge active
0 : Falling edge active
1 : Rising edge active
0 : INT
1 : A-D conversion interrupt
0 : Falling edge active
1 : Rising edge active
0 : Falling edge active
1 : Rising edge active
0 : Without passing through zero
1 : Passing through zero
0 : One-sided edge detection
1 : Both-sided edges detection ( Note)
0 : Less than 0 V
1 : 0 V or more
00 : Note use noise filter
01 : f(X
10 : f(X
11 : f(X
cross detection comparator
cross detection comparator
4
IN
IN
IN
interrupt
)/64 or f(X
)/128 or f(X
)/256 or f(X
Function
Function
3.3 Control registers
CIN
CIN
CIN
16
)/64
]
)/128
)/256
16
MITS
]
16
) is set to “00” (when
UBISHI MICROCOMPUTER
3819 Group
At reset
At reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R W
R W