UPD78F9177 NEC, UPD78F9177 Datasheet - Page 35

• Manufacturer Part Number: UPD78F9177
• Description: 8-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

(3) Serial interface SMB0 (T
Note V
Input voltage, high
Input voltage, low
Output voltage,
high
Input leakage
current, high
Input leakage
current, low
Input range
Transfer level
Input level
threshold value
(a) DC Characteristics
(b) DC Characteristics (When using comparator)
Parameter
Parameter
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;
"LVL01, LVL00 = 0, 0" is not available since this setting does not satisfy the SMB standard (V1.1).
ISMB
When V
When V
When V
is an input level threshold value selected by bits LVL00 and LVL01 (bits 0 and 1 of SMB input level
DD
DD
DD
= 1.8 to 3.3 V: LVL01, LVL00 = 1, 1 (0.5
= 3.3 to 4.5 V: LVL01, LVL00 = 1, 0 (0.375
= 4.5 to 5.5 V: LVL01, LVL00 = 0, 1 (0.25
Symbol
Symbol
V
V
V
V
V
V
V
I
V
I
ISDA
SDA
ISMB
LIH
ISCL
LIL
SCL
OL
IH
IL
,
,
SCL0, SDA0 (at hysteresis)
SCL0, SDA0 (at hysteresis)
SCL0, SDA0
SCL0, SDA0
SCL0, SDA0
V
4.5
3.3
2.7
1.8
LVL01, LVL00 = 0, 1
LVL01, LVL00 = 1, 0
LVL01, LVL00 = 1, 1
A
DD
= 40 to +85 C, V
= 1.8 to 5.5 V
V
V
V
V
DD
DD
DD
DD
< 4.5 V
< 3.3 V
< 2.7 V
5.5 V
V
V
V
V
DD
DD
I
I
= V
= 0 V
Conditions
Conditions
= 4.5 to 5.5 V, I
= 1.8 to 5.5 V, I
DD
Data Sheet U14022EJ1V0DS00
DD
= 1.8 to 5.5 V) ( PD78F9177Y only)
OL
OL
= 10 mA
= 400
V
V
DD
V
DD
)
DD
)
)
A
0.72 V
0.78 V
0.75 V
0.90 V
MIN.
0.8 V
0
MIN.
PD78F9177, 78F9177Y
0
ISMB
ISMB
ISMB
ISMB
DD
0.25 V
0.375 V
0.5
TYP.
V
V
V
V
TYP.
ISMB
ISMB
ISMB
ISMB
V
DD
DD
DD
1.28 V
1.22 V
1.25 V
1.45 V
0.2 V
MAX.
MAX.
5.5
V
1.0
0.5
3
DD
3
ISMB
ISMB
ISMB
ISMB
DD
Unit
Unit
V
V
V
V
V
V
V
V
V
V
V
V
A
A
35