M306V0ME Mitsubishi, M306V0ME Datasheet - Page 129

• Manufacturer Part Number: M306V0ME
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

Rev. 1.0
Table 2.11.10 Features in I
10
11
12
1
2
3
4
5
6
7
8
9
In the first place, the control bits related to the I
Setting 1 in the I
interface effective. Table 2.11.10 shows the relation between the I
control workings.
Since this function uses clock-synchronous serial I/O mode, be sure to set this bit to “0” in UART mode.
Figure 2.11.32 shows the functional block diagram for I
(IICM) causes ports P7
(address 027D
minals; SCL1, SCL2 respectively. A delay circuit is added to the SDA transmission output, so the SDA
output changes after SCL fully goes to L. An attempt to read Port P7
getting the terminal’s level regardless of the content of the port direction register. The initial value of SDA
transmission output in this mode goes to the value set in port (P7
SDA2, P7
rupt, UART
detection interrupt, acknowledgment non-detection (NACK) interrupt, and acknowledgment detection
(ACK) interrupt respectively.
The start condition detection interrupt refers to the interrupt that occurs when the falling edge of the SDA
terminal is detected with the SCL terminal staying “H.” The stop condition detection interrupt refers to the
interrupt that occurs when the rising edge of the SDA terminal is detected with the SCL terminal staying
“H”. The bus busy flag (bit 2 of the special UART2 mode register) is set to “1” by the start condition
detection, and set to “0” by the stop condition detection. The acknowledgment non-detection interrupt
refers to the interrupt that occurs when the SDA terminal’s level is detected still staying “H” at the rising
edge of the 9th transmission clock. The acknowledgment detection interrupt refers to the interrupt that
occurs when SDA terminal’s level is detected already went to “L” at the 9th transmission clock. Also,
assigning 1 1 0 1 (UART2 reception) to the DMA1 request factor selection bits provides the means to start
up the DMA transfer by the effect of acknowledgment detection.
Factor of interrupt number 10
Factor of interrupt number 15
Factor of interrupt number 16
UART2 transmission output delay
P7
P7
P7
DMA1 factor at the time when 1 1 0 1
is assigned to the DMA request factor
selection bits
Noise filter width
Reading P7
Initial value of UART2 output
P6
0
1
2
7
at the time when UART2 is in use
at the time when UART2 is in use
at the time when UART2 is in use
input/output
1
/P7
Function
0
2
when using both SDA1 and SDA2). The interrupt factors of the bus collision detection inter-
2
transmission interrupt, and of UART2 reception interrupt turn to the start/stop condition
16
2
) to work as data transmission-reception terminals; SDA1, SDA2, clock input-output ter-
C mode selection bit (bit 0) goes the circuit to achieve the I
0
, P6
2
Bus collision detection
UART2 transmission
UART2 reception
Not delayed
TxD
RxD
CLK
UART2 reception
15 ns
Reading the terminal
when 0 is assigned to
the direction register
H level (when 0 is
assigned to the CLK
polarity select bit)
P6
C mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
7
2
2
2
(CMOS)
Normal mode
7
(output)
(input)
(CMOS)
, P7
1
, and P7
Start condition detection or stop
condition detection (Note)
No acknowledgment detection (NACK) (Note)
Acknowledgment detection (ACK) (Note)
Delayed
SDA1 (input/output) (Note 3)
SCL1 (input/output) (Note 3)
SCL2 (N-channel open-drain) (Note 3)
Acknowledgment detection (ACK)
50 ns
Reading the terminal regardless of the
value of the direction register (Note 3)
The value set in latch P7
is selected (Note 3)
SDA2 (N-channel open-drain) (Note 3)
2
selected by bits 0 and 1 of the peripheral mode register
2
C-BUS interface are explained.
I
2
C mode
2
C mode. Setting “1” in the I
0
/P6
7
when the port
0
and ON-SCREEN DISPLAY CONTROLLER
2
C mode selection bit and respective
when using SDA1, P6
MITSUBISHI MICROCOMPUTERS
1
Notes 1: Make the settings given below when I
(SCL1), P7
M306V0ME-XXXFP
2
C-BUS (simplified I
2: Follow the steps given below to switch
3: In I
•Set 0 1 0 in bits 2, 1, 0 of the UART2
•Disable the RTS/CTS function.
•Choose the LSB First function.Follow
mode is in use.
interface ports.
transmission-reception mode register.
from a factor to another.
the steps given below to switch from
a factor to another.
1. Disable the interrupt of the
2. Switch from a factor to another.
3. Reset the interrupt request flag
4. Set an interrupt level of the
2
corresponding number.
of the corresponding number.
corresponding number.
C mode and when setting as I
2
C mode selection bit
M306V0EEFP
2
(SCL2) results in
7
when using
2
C-BUS)
2
C-BUS
2
C
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