M16CSLASH62 datasheet(58/87 Pages) RENESAS

58 / 87 page

VCC1 = VCC2 = 3V

M16C/62 Group (M16C/62P, M16C/62PT)

5. Electrical Characteristics (M16C/62P)

page 58

Switching Characteristics

(VCC1 = VCC2 = 3V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)

Figure 5.11 Ports P0 to P14 Measurement Circuit

Table 5.46 Memory Expansion, Microprocessor Modes (for setting with no wait)

Symbol

Standard

Measuring condition

Max.

Min.

Parameter

Unit

td(BCLK-AD)

Address output delay time30

th(BCLK-AD)

Address output hold time (refers to BCLK)4

th(BCLK-CS)

Chip select output hold time (refers to BCLK)4

td(BCLK-ALE)

ALE signal output delay time25

th(BCLK-ALE)

ALE signal output hold time

–4

td(BCLK-RD)

RD signal output delay time30

th(BCLK-RD)

RD signal output hold time0

td(BCLK-WR)

WR signal output delay time30

th(BCLK-WR)

WR signal output hold time0

td(BCLK-DB)

Data output delay time (refers to BCLK)40

th(BCLK-DB)

Data output hold time (refers to BCLK)(3)

4ns

th(WR-DB)

Data output hold time (refers to WR)(3)

td(DB-WR)

Data output delay time (refers to WR)ns

1. Calculated according to the BCLK frequency as follows:

f(BCLK)

0.5 X 109

– 40

[ns]

td(BCLK-CS)

Chip select output delay time30

th(RD-AD)

Address output hold time (refers to RD)0

th(WR-AD)

Address output hold time (refers to WR)

(Note 2)

3. This standard value shows the timing when the output is off,

and does not show hold time of data bus.

Hold time of data bus varies with capacitor volume and pull-up

(pull-down) resistance value.

Hold time of data bus is expressed in

t = –CR X ln (1 – VOL / VCC2)

by a circuit of the right figure.

For example, when VOL = 0.2VCC2, C = 30pF, R = 1k

Ω, hold time

of output “L” level is

t = – 30pF X 1k

Ω X ln (1 – 0.2VCC2 / VCC2)

= 6.7ns.

DBi

(Note 1)

(Note 2)

2. Calculated according to the BCLK frequency as follows:

f(BCLK)

0.5 X 109

[ns]

f(BCLK) is 12.5MHz or less.

– 10

NOTES:

HLDA output delay time

td(BCLK-HLDA)

See Figure 5.11

P10

30pF

P11

P12

P13

P14

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