32C87 datasheet(67/91 Pages) RENESAS

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M32C/87 Group (M32C/87, M32C/87A, M32C/87B)

5. Electrical Characteristics

REJ03B0127-0151 Rev.1.51 Jul 31, 2008

Page 67 of 85

Figure 5.5

VCC1 = VCC2 = 5 V Timing Diagram (3/4)

VCC1=VCC2=5V

Memory Expansion Mode and Microprocessor Mode

(when accessing an external memory space)

NOTES:

1. Values guaranteed only when the MCU is used stand-alone.

A maximum of 35 ns is guaranteed for td(BCLK-AD) + tsu(DB-BCLK).

2. Varies with operation frequency:

tac1(RD-DB) = (tcyc / 2 x m - 35) ns.max (if external bus cycle a

φ + bφ, m = (b x 2) + 1)

tac1(AD-DB) = (tcyc x n - 35) ns.max (if external bus cycle a

φ + bφ, n = a + b)

Read Timing (1

φ + 1φ Bus Cycle)

Write Timing (1

φ + 1φ Bus Cycle)

NOTES:

3. Varies with operation frequency:

td(DB-WR) = (tcyc x m - 20) ns.min

(if external bus cycle a

φ + bφ, m = b)

th(WR-DB) = (tcyc / 2 - 15) ns.min

th(WR-AD) = (tcyc / 2 - 10) ns.min

th(WR-CS) = (tcyc / 2 - 10) ns.min

tw(WR) = (tcyc / 2 x n - 15) ns.min

(if external bus cycle a

φ + bφ, n = (b x 2) - 1)

Measurement Conditions:

- VCC1 = VCC2 = 4.2 to 5.5 V

- Input high and low voltage: VIH = 2.5 V, VIL = 0.8 V

- Output high and low voltage: VOH = 2.0 V, VOL = 0.8 V

tcyc=

109

f(BCLK)

BCLK

CSi

ADi

BHE

DBi

th(BCLK-CS)

-3ns.min

td(BCLK-CS)

18ns.max

tcyc

td(BCLK-AD)

18ns.max

th(WR-AD)(3)

th(BCLK-WR)

-5ns.min

td(DB-WR)(3)

th(BCLK-AD)

-3ns.min

td(BCLK-WR)

18ns.max

tw(WR)(3)

th(WR-DB)(3)

th(WR-CS)(3)

WR,WRL,WRH

BCLK

CSi

ADi

BHE

DBi

th(BCLK-CS)

-3ns.min

th(RD-CS)

0ns.min

td(BCLK-CS)

18ns.max(1)

tcyc

td(BCLK-AD)

18ns.max(1)

18ns.max

td(BCLK-RD)

th(RD-AD)

0ns.min

th(BCLK-RD)

-5ns.min

tac1(RD-DB)(2)

tac1(AD-DB)(2)

Hi-Z

th(RD-DB)

0ns.min

tsu(DB-BCLK)

26ns.min(1)

th(BCLK-AD)

-3ns.min

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