HD64F2149 Datasheet, PDF (794/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Table 25.9 Keyboard Buffer Controller Timing
Conditions: V_CC = 2.7 V to 3.6 V, V_CCB = 2.7 V to 5.5 V, V_SS = 0 V, ø = 2 MHz to maximum
operating frequency, T_a = –20 to +75°C
Item
KCLK, KD output fall time
KCLK, KD input data hold time
KCLK, KD input data setup time
KCLK, KD output delay time
KCLK, KD capacitive load
Ratings
Symbol Min
Typ Max
t _KBF
20 + 0.1Cb —
250
t _KBIH
150
—
—
t _KBIS
150
—
—
t _KBOD
—
—
450
C_b
—
—
400
Unit Notes
ns Figure 25.26
ns
ns
ns
pF
1. Reception
ø
KCLK/
KD*
2. Transmission (a)
ø
KCLK/
KD*
t_KBIS t_KBIH
T1
T2
t_KBOD
Transmission (b)
KCLK/
KD*
t_KBF
Note: ø shown here is the clock scaled by 1/N when the operating mode is active
medium-speed mode.
* KCLK: PS2AC to PS2CC
KD: PS2AD to PS2CD
Figure 25.26 Keyboard Buffer Controller Timing
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