M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 382

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

SIM interface
Figure 2.5.14. Operation timing of transmission in UART mode (used for SIM interface)
Transmit
enable bit (TE)
Signal line level
(Note 2)
Transfer clock
Transmit buffer
empty flag (Tl)
T
R
Transmit buffer
empty flag
(TEXPT)
Transmit
interrupt request
bit (IR)
X
X
Example of wiring
Example of operation (when direct format)
D
D
2
2
(Note 2)
(Note 2)
Note 1: The transmit is started with overflow timing of BRG after having written in a value at the transmit buffer in the above timing.
Note 2: TxD
The above timing applies to the following settings :
Shown in ( ) are bit symbols.
• Parity is enabled.
• One stop bit.
• Transmit interrupt cause select bit = “1”.
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
become the same signal from the logical standpoint, but the output signals turn complex, so they are shown separately. Also,
the signal level resulting from connecting TxD
(1) Transmission enabled
2
and RxD
(2) Start transmission
Microcomputer
Start
ST
ST
Data is set in UART2 transmit buffer register
bit
2
are connected in the manner of wired OR as shown in the connection diagram. So TxD
D
D
0
0
D
D
1
1
Tc
RxD
D
D
TxD
2
2
D
D
3
3
D
D
2
4
4
2
Transferred from UART2 transmit buffer register to UART2 transmit register
D
D
5
5
D
D
6
6
Cleared to “0” when interrupt request is accepted, or cleared by software
2
D
D
Parity
7
7
and RxD
bit
Tc = 16 (n + 1) / fi
P
P
SP
SP
Stop
fi : frequency of BRG2 count source (f
n : value set to BRG2
(3) Confirme stop bit
bit
2
is shown as a signal line level.
(4) Start transmission
(Note 1)
ST
ST
Detects the level
using an interrupt
routine
Since a parity error occurred, the
“L” level returns from TxD
D
D
0
0
D
D
1
1
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D
D
2
2
SIM card
D
D
3
3
D
D
4
4
1
D
D
, f
5
5
8
2
D
D
, f
6
6
32
)
D
D
7
7
2
and RxD
P
P
SP
SP
Mitsubishi microcomputers
(5) Dispose
M16C / 62 Group
parity error
2
ought to
Detects the level
using an interrupt
routine
367