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UPD784044 Datasheet, PDF (67/90 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER | |||
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µPD784044(A), 784046(A)
(2) Electrical specifications of µPD784044(A1), 784046(A1) (5/6)
Serial Operation (TA = â40 to +110 ËC, VDD = 4.5 to 5.5 V, VSS = 0 V)
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
Serial clock cycle time
tCYSK
SCK1, SCK2 output BRG
TSFT
ns
SCK1, SCK2 input External clock
800
ns
Serial clock low-level width
tWSKL
SCK1, SCK2 output BRG
0.5TSFTâ40
ns
SCK1, SCK2 input External clock
360
ns
Serial clock high-level width
tWSKH
SCK1, SCK2 output BRG
0.5TSFTâ40
ns
SCK1, SCK2 input External clock
360
ns
SI1, SI2 setup time
(vs. SCK1, SCK2â)
tSSSK
80
ns
SI1, SI2 hold time
(vs. SCK1, SCK2â)
tHSSK
80
ns
SCK1, SCK2ââSO1, SO2
output delay time
tDSBSK
R = 1 kâ¦, C = 100 pF
0
150
ns
Remarks 1. TSFT is a value set in software. The minimum value is tCYK Ã 8.
2. tCYK = 1/fCLK (fCLK is internal system clock frequency)
Other Operations (TA = â40 to +110 ËC, VDD = 4.5 to 5.5 V, VSS = 0 V)
Parameter
Symbol
NMI high, low-level width
tWNIH, tWNIL
INTP0-INTP6 high, low-level width tWITH, tWITL
TI2, TI3 high, low-level width tWTIH, tWTIL
RESET high, low-level width
tWRSH, tWRSL
Conditions
MIN.
10
4
4
10
MAX.
Unit
µs
tCYSMP
tCYSMP
µs
Remarks 1. tCYSMP is a sampling clock set in the noise protection control register (NPC) in software.
When NIn = 0, tCYSMP = tCYK
When NIn = 1, tCYSMP = tCYK Ã 4
2. tCYK = 1/fCLK (fCLK is internal system clock frequency)
3. NIn: Bit n of NPC (n = 0-6)
AC Timing Test Point
VDD
0.8 VDD or 2.2 V
Test point
0.8 VDD or 2.2 V
0.8 V
0V
0.8 V
67
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