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HD64F2145 Datasheet, PDF (733/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer | |||
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Table 28.9 Keyboard Buffer Controller Timing
Conditions: VCC = 2.7 V to 3.6 V, VCCB = 2.7 V to 5.5 V, VSS = 0 V, ø = 2 MHz to maximum
operating frequency, Ta = â20 to +75°C
Item
Symbol
KCLK, KD output fall time
t
KBF
KCLK, KD input data hold time tKBIH
KCLK, KD input data setup time tKBIS
KCLK, KD output delay time
tKBOD
KCLK, KD capacitive load
Cb
Ratings
Min
Typ
20 + 0.1Cb â
150
â
150
â
â
â
â
â
Max
250
â
â
450
400
Unit
ns
ns
ns
ns
pF
Test
Conditions Notes
Figure
28.28
Table 28.10 I2C Bus Timing
Conditions: VCC = 2.7 V to 3.6 V, VSS = 0 V, ø = 5 MHz to maximum operating frequency,
Ta = â20 to +75°C
Item
Ratings
Symbol Min Typ Max Unit
Test
Conditions Notes
SCL input cycle time
tSCL
SCL input high pulse width
tSCLH
SCL input low pulse width
t
SCLL
SCL, SDA input rise time
t
Sr
SCL, SDA input fall time
t
Sf
SCL, SDA input spike pulse
tSP
elimination time
12
â
â
tcyc
3
â
â
tcyc
5
âât
cyc
â
â
7.5*
t
cyc
â â 300 ns
ââ1
tcyc
Figure
28.29
SDA input bus free time
t
BUF
Start condition input hold time t
STAH
Retransmission start condition t
STAS
input setup time
5
âât
cyc
3
âât
cyc
3
âât
cyc
Stop condition input setup time t
STOS
3
âât
cyc
Data input setup time
t
SDAS
0.5 â â t
cyc
Data input hold time
t
SDAH
0
â â ns
SCL, SDA capacitive load
Cb
â â 400 pF
Note:* 17.5 tcyc can be set according to the clock selected for use by the I2C module. For details,
see section 16.6, Usage Notes.
Rev. 2.0, 08/02, page 693 of 788
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