
50
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C8 Group
twH(SCLK)
twL(SCLK)
td(SCLK-TxD)
tV(SCLK-TxD)
tr(SCLK)
tf(SCLK)
tr(CMOS)
tf(CMOS)
twH(SCLK)
twL(SCLK)
td(SCLK-TxD)
tV(SCLK-TxD)
tr(SCLK)
tf(SCLK)
tr(CMOS)
tf(CMOS)
Limits
Parameter
Min.
tc(SCLK)/2–30
tc(SCLK)/2–30
–30
Typ.
10
10
Max.
140
30
30
30
30
Symbol Unit
ns
ns
ns
ns
ns
ns
ns
ns
Notes 1: When the P45/TxD P-channel output disable bit of the UART control register (bit 4 of address 001B16) is “0”.
2: The X
OUT and XCOUT pins are excluded.
Serial I/O clock output “H” pulse width
Serial I/O clock output “L” pulse width
Serial I/O output delay time (Note 1)
Serial I/O output valid time (Note 1)
Serial I/O clock output rising time
Serial I/O clock output falling time
CMOS output rising time (Note 2)
CMOS output falling time (Note 2)
Table 21 Switching characteristics 1 (Vcc = 4.0 to 5.5 V, Vss = 0 V, Ta = –20 to 85°C, unless otherwise noted)
Limits
ns
ns
ns
ns
ns
ns
ns
ns
Parameter
Min.
tC(SCLK)/2–50
tC(SCLK)/2–50
–30
Typ.
20
20
Max.
350
50
50
50
50
Symbol Unit
Serial I/O clock output “H” pulse width
Serial I/O clock output “L” pulse width
Serial I/O output delay time (Note 1)
Serial I/O output valid time (Note 1)
Serial I/O clock output rising time
Serial I/O clock output falling time
CMOS output rising time (Note 2)
CMOS output falling time (Note 2)
Table 22 Switching characteristics 2 (Vcc = 2.2 to 4.0 V, Vss = 0 V, Ta = –20 to 85°C, unless otherwise noted)
Notes 1: When the P45/TxD P-channel output disable bit of the UART control register (bit 4 of address 001B16) is “0”.
2: The X
OUT and XCOUT pins are excluded.
Fig. 46 Circuit for measuring output switching characteristics
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