M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 202

• 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

Table 7.4.3 Setting examples of transfer rate (1)
SERIAL I/O
7.4 Clock asynchronous serial I/O (UART) mode
7–36
7.4.1 Transfer rate (frequency of transfer clock)
The transfer rate is determined by the BRGi (addresses 31
When setting “n” into BRGi (n = “00
divided clock by BRGi is further divided by 16 and the resultant clock becomes the transfer clock. Accordingly,
the value “n” is expressed by the following formula.
An internal clock or an external clock can be selected as the BRGi’s count source with the internal/external
clock select bit (bit 3 at addresses 30
the BRG count source select bits (bits 0 and 1 at addresses 34
When an external clock is selected, the clock input to the CLK
Tables 7.4.3 and 7.4.4 are list the setting examples of transfer rate. Set the same transfer rate between
the transmitter and the receiver.
500000
125000
250000
rate (bps)
Transfer
19200
31250
62500
1200
2400
4800
9600
n =
110
134.5
150
300
600
75
16
F
BRGi count
B
source
— 1
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
512
64
64
64
64
64
16
16
2
2
2
2
2
2
2
2
f(X
BRGi setting
12 (0C
12 (0C
12 (0C
12 (0C
value : n
70 (46
57 (39
51 (33
25 (19
25 (19
51 (33
25 (19
IN
7 (07
3 (03
1 (01
0 (00
) = 8 MHz
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
” to “FF
16
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
, 38
7702/7703 Group User’s Manual
16
n: Value set into BRGi
F: BRGi’s count source frequency
B: Transfer rate
). When an internal clock is selected, the clock selected with
125000.00
250000.00
Actual time
16
19230.77
31250.00
62500.00
”), BRGi divides the count source frequency by n + 1. The
1201.92
2403.85
4807.69
9615.39
(bps)
110.04
134.70
150.24
300.48
600.96
75.12
BRGi count
16
, 39
source
16
i
, 3C
pin becomes the BRGi’s count source.
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
16
512
64
64
64
64
64
16
16
2
2
2
2
2
2
2
2
).
16
) becomes the BRGi’s count source.
f(X
BRGi setting
141 (8D
115 (73
103 (67
103 (67
value : n
15 (0F
25 (19
51 (33
25 (19
51 (33
25 (19
51 (33
25 (19
IN
7 (07
3 (03
1 (01
0 (00
) = 16 MHz
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
125000.00
250000.00
500000.00
Actual time
19230.77
31250.00
62500.00
1201.92
2403.85
4807.69
9615.39
(bps)
110.04
134.70
150.24
300.48
600.96
75.12