M38C89MB datasheet(51/55 Pages) RENESAS

51 / 55 page

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

–30

Typ.

Max.

140

Symbol

Unit

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 XOUT 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

Parameter

Min.

tC(SCLK)/2–50

–30

Typ.

Max.

350

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 XOUT and XCOUT pins are excluded.

Fig. 46 Circuit for measuring output switching characteristics

Measurement output pin

100 pF

CMOS output

Note: When bit 4 of the UART control register

(address 001B16) is “1”. (N-channel open-

drain output mode)

N-channel open-drain output (Note)

1 k

Ω

100 pF

Measurement output pin

M38C89MB Datasheet(PDF) 51 Page - Renesas Technology Corp

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