M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 190

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SERIAL I/O
7.3 Clock synchronous serial I/O mode
Fig. 7.3.4 Transmit operation
Fig. 7.3.5 Example of transmit timing (when selecting internal clock)
7–24
Transfer clock
interrupt request bit
Transmit enable bit
Transmit register
Transmit buffer
UARTi transmit
Transfer clock
empty flag
empty flag
T
CTS
CLK
TxD
END
i
i
i
i
“H”
“L”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
The above timing diagram applies to
the following conditions:
Internal clock selected
CTS function selected.
D
0
Data is set in UARTi transmit buffer register.
D
UARTi transmit buffer register
1
T
D
CLK
2
D
3
UARTi transmit register
D
Tc
4
UARTi transmit register
D
5
7702/7703 Group User’s Manual
D
6
D
Cleared to “0” when interrupt request is accepted or cleared by software.
T
Tc = T
ENDi
7
Stopped because CTSi = “H.”
: Next transmit conditions are examined when this signal level is “H.”
fi: BRGi count source frequency (f
n: Value set to BRGi
CLK
(T
D
ENDi
= 2(n+1) /fi
0
D
is an internal signal. Accordingly, it cannot be read from an external.)
1
UARTi transmit buffer register.
D
2
D
MSB
3
b7
D
D
7
4
D
5
D
D
D
6
7
6
2
, f
D
16
D
D
D
7
, f
Transmit data
6
5
7
64
, f
Stopped because transmit enable bit = “0.”
512
D
D
D
D
)
4
5
6
7
D
0
D
D
D
D
D
1
3
4
5
6
D
2
D
D
D
D
D
2
3
4
5
3
D
D
D
D
D
4
2
4
1
3
D
5
LSB
D
D
D
D
D
6
b0
0
1
2
3
D
7
D
D
D
D
0
1
2
7