8XC196NU Datasheet, PDF (29/43 Pages) Intel Corporation – 8XC196NU COMMERCIAL CHMOS 16-BIT MICROCONTROLLER

8XC196NU COMMERCIAL CHMOS 16-BIT MICROCONTROLLER
6.2.3 AC CHARACTERISTICS — MULTIPLEXED BUS MODE
Test Conditions: Capacitive load on all pins = 50 pF, Rise and Fall Times = 3 ns.
Table 12. AC Characteristics the 8XC196NU Will Meet, Multiplexed Bus Mode
Symbol
Parameter
Min
Max
Units
F_XTAL1
Frequency on XTAL1, PLL in 1x mode
Frequency on XTAL1, PLL in 2x mode
16
8 (2)
50 (1)
25
MHz
MHz
Frequency on XTAL1, PLL in 4x mode
8 (2)
12.5
MHz
f
Operating frequency, f = F_XTAL1; PLL in 1x mode
Operating frequency, f = 2F_XTAL1; PLL in 2x mode
Operating frequency, f = 4F_XTAL1; PLL in 4x mode
t
Period, t = 1/f
16
50
MHz
20
62.5
ns
T_XHCH
XTAL1 Rising Edge to CLKOUT High or Low
3
50
ns
T_CLCL
CLKOUT Cycle Time
2t
ns
T_CHCL
CLKOUT High Period
t – 10
t + 15
ns
T_AVWL
Address Valid to WR# Falling Edge
2t – 25
ns
T_CLLH
CLKOUT Falling Edge to ALE Rising Edge
– 10
10
ns
T_LLCH
ALE Falling Edge to CLKOUT Rising Edge
– 15
15
ns
T_LHLH
ALE Cycle Time
4t
ns (3)
T_LHLL
ALE High Period
t – 10
t + 10
ns
T_AVLL
Address Valid to ALE Falling Edge
t – 14
ns
T_LLAX
Address Hold after ALE Falling Edge
t – 10
ns
T_LLRL
ALE Falling Edge to RD# Falling Edge
t – 15
ns
T_RLCL
RD# Low to CLKOUT Falling Edge
– 10
20
ns
T_RLRH
RD# Low Period
t – 10
ns (3)
T_RHLH
RD# Rising Edge to ALE Rising Edge
t–5
t + 15
ns (4)
T_RLAZ
RD# Low to Address Float
5
ns
T_LLWL
ALE Falling Edge to WR# Falling Edge
t – 11
ns
T_QVWH
Data Stable to WR# Rising Edge
t – 14
ns (3)
T_CHWH
CLKOUT High to WR# Rising Edge
– 15
5
ns
NOTES:
1. 25 MHz is the maximum input frequency when using an external crystal oscillator; however, 50 MHz
can be applied with an external clock source.
2. When the phase-locked loop (PLL) circuitry is enabled, the minimum input frequency on XTAL1 is 8
MHz. The PLL cannot be run at frequencies lower than 16 MHz.
3. If wait states are used, add 2t × n, where n = number of wait states.
4. Assuming back-to-back bus cycles.
5. 8-bit bus only.
PRELIMINARY
25