19
FN6140.2
June 15, 2006
AC Electrical Specifications V
CC
= +5V± 10%, GND = 0V; T
A
= Operating Temperature Range
SYMBOL PARAMETER
TEST
CONDITIONS
82C55A
UNITSMIN MAX
READ TIMING
(1) tAR Address Stable Before RD
0-ns
(2) tRA Address Stable After RD
0-ns
(3) tRR RD Pulse Width 150 - ns
(4) tRD Data Valid From RD
1 - 120 ns
(5) tDF Data Float After RD
21075ns
(6) tRV Time Between RDs and/or WRs 300 - ns
WRITE TIMING
(7) tAW Address Stable Before WR
0-ns
(8) tWA Address Stable After WR 20 - ns
(9) tWW WR
Pulse Width 100 - ns
(10) tDW Data Valid to WR
High 100 - ns
(11) tWD Data Valid After WR High 30 - ns
OTHER TIMING
(12) tWB WR
= 1 to Output 1 - 350 ns
(13) tIR Peripheral Data Before RD
0-ns
(14) tHR Peripheral Data After RD 0-ns
(15) tAK ACK Pulse Width 200 - ns
(16) tST STB Pulse Width 100 - ns
(17) tPS Peripheral Data Before STB High 20 - ns
(18) tPH Peripheral Data After STB High 50 - ns
(19) tAD ACK = 0 to Output 1 - 175 ns
(20) tKD ACK = 1 to Output Float 2 20 250 ns
(21) tWOB WR
= 1 to OBF = 0 1 - 150 ns
(22) tAOB ACK = 0 to OBF = 1 1 - 150 ns
(23) tSIB STB = 0 to IBF = 1 1 - 150 ns
(24) tRIB RD
= 1 to IBF = 0 1 - 150 ns
(25) tRIT RD
= 0 to INTR = 0 1 - 200 ns
(26) tSIT STB = 1 to INTR = 1 1 - 150 ns
(27) tAIT ACK = 1 to INTR = 1 1 - 150 ns
(28) tWIT WR
= 0 to INTR = 0 1 - 200 ns
(29) tRES Reset Pulse Width 1, (Note) 500 - ns
NOTE: Period of initial Reset pulse after power-on must be at least 50µsec. Subsequent Reset pulses may be 500ns minimum.
MS82C55A, MQ82C55A, MP82C55A
