UPD78F9177 Datasheet, PDF (35/56 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78F9177, 78F9177Y
(3) Serial interface SMB0 (TA = −40 to +85 °C, VDD = 1.8 to 5.5 V) (µPD78F9177Y only)
(a) DC Characteristics
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Input voltage, high
VIH SCL0, SDA0 (at hysteresis)
0.8 VDD
VDD
V
Input voltage, low
VIL SCL0, SDA0 (at hysteresis)
0
Output voltage,
high
VOL SCL0, SDA0 VDD = 4.5 to 5.5 V, IOL = 10 mA
VDD = 1.8 to 5.5 V, IOL = 400 µ A
0.2 VDD
V
1.0
V
0.5
V
Input leakage
current, high
ILIH
SCL0, SDA0 VI = VDD
3
µA
Input leakage
current, low
ILIL SCL0, SDA0 VI = 0 V
−3
µA
(b) DC Characteristics (When using comparator)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Input range
VSDA,
VSCL
VDD = 1.8 to 5.5 V
0
5.5
V
Transfer level
VISDA,
VISCL
4.5 ≤ VDD ≤ 5.5 V
3.3 ≤ VDD < 4.5 V
0.72 VISMB
VISMB
1.28 VISMB
V
0.78 VISMB
VISMB
1.22 VISMB
V
Input level
threshold value
VISMB
2.7 ≤ VDD < 3.3 V
1.8 ≤ VDD < 2.7 V
LVL01, LVL00 = 0, 1
LVL01, LVL00 = 1, 0
LVL01, LVL00 = 1, 1
0.75 VISMB
VISMB
1.25 VISMB
V
0.90 VISMB
VISMB
1.45 VISMB
V
0.25 × VDD
V
0.375 × VDD
V
0.5 × VDD
V
Note VISMB is an input level threshold value selected by bits LVL00 and LVL01 (bits 0 and 1 of SMB input level
setting register 0 (SMBVI0)).
According to the SMB standard (V1.1), the maximum value of low-level input voltage is 0.8 V, and the
minimum value of high-level input voltage, 2.1 V. To satisfy these conditions, set LVL01 and LVL00 as
follows;
• When VDD = 1.8 to 3.3 V: LVL01, LVL00 = 1, 1 (0.5 × VDD)
• When VDD = 3.3 to 4.5 V: LVL01, LVL00 = 1, 0 (0.375 × VDD)
• When VDD = 4.5 to 5.5 V: LVL01, LVL00 = 0, 1 (0.25 × VDD)
"LVL01, LVL00 = 0, 0" is not available since this setting does not satisfy the SMB standard (V1.1).
Data Sheet U14022EJ1V0DS00
35