M38258MCM Datasheet, PDF (49/70 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3825 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table 18. Timing requirements 1 (VCC = 4.0 to 5.5 V, VSS = 0 V, Ta = –20 to 85°C, unless otherwise noted.)
Symbol
Parameter
Limits
Unit
Min. Typ. Max.
tw(RESET) Reset input “L” pulse width
2
µs
tc(XIN)
Main clock input cycle time (XIN input)
125
ns
twH(XIN)
Main clock input “H” pulse width
45
ns
twL(XIN)
Main clock input “L” pulse width
40
ns
tc(CNTR)
CNTR0, CNTR1 input cycle time
250
ns
twH(CNTR) CNTR0, CNTR1 input “H” pulse width
105
ns
twL(CNTR) CNTR0, CNTR1 input “L” pulse width
105
ns
twH(INT)
INT0 to INT3 input “H” pulse width
80
ns
twL(INT)
INT0 to INT3 input “L” pulse width
80
ns
tc(SCLK)
Serial I/O clock input cycle time (Note)
800
ns
twH(SCLK)
Serial I/O clock input “H” pulse width (Note)
370
ns
twL(SCLK)
Serial I/O clock input “L” pulse width (Note)
370
ns
tsu(RXD–SCLK) Serial I/O input set up time
220
ns
th(SCLK–RXD) Serial I/O input hold time
100
ns
Note : When f(XIN) = 8 MHz and bit 6 of address 001A16 is “1” (Clock synchronous).
Divide this value by four when f(XIN) = 8 MHz and bit 6 of address 001A16 is “0” (UART).
Table 19. Timing requirements 2 (VCC = 2.5 to 4.0 V, VSS = 0 V, Ta = –20 to 85°C, unless otherwise noted.)
Symbol
tw(RESET)
tc(XIN)
twH(XIN)
twL(XIN)
tc(CNTR)
Parameter
Reset input “L” pulse width
Main clock input cycle time (XIN input)
Main clock input “H” pulse width
Main clock input “L” pulse width
CNTR0, CNTR1 input cycle time
Limits
Unit
Min. Typ. Max.
2
µs
125
ns
45
ns
40
ns
500/
(VCC–2)
ns
twH(CNTR) CNTR0, CNTR1 input “H” pulse width
250/
ns
(VCC–2)–20
twL(CNTR)
twH(INT)
twL(INT)
tc(SCLK)
twH(SCLK)
twL(SCLK)
tsu(RXD–SCLK)
th(SCLK–RXD)
CNTR0, CNTR1 input “L” pulse width
INT0 to INT3 input “H” pulse width
INT0 to INT3 input “L” pulse width
Serial I/O clock input cycle time (Note)
Serial I/O clock input “H” pulse width (Note)
Serial I/O clock input “L” pulse width (Note)
Serial I/O input set up time
Serial I/O input hold time
250/
(VCC–2)–20
ns
230
ns
230
ns
2000
ns
950
ns
950
ns
400
ns
200
ns
Note: When f(XIN) = 8 MHz and bit 6 of address 001A16 is “1” (Clock synchronous).
Divide this value by four when f(XIN) = 8 MHz and bit 6 of address 001A16 is “0” (UART).
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