Z8E001 Datasheet, PDF (26/49 Pages) Zilog, Inc. – CMOS OTP Microcontroller

Z8E001
CMOS OTP Microcontroller
LC OSCILLATOR
The Z8E001 oscillator can use a LC network to generate a
XTAL clock (Figure 16).
The frequency stays stable over V_CC and temperature. The
oscillation frequency is determined by the equation:
Frequency =
1
2π (LC_T) ^1/2
where L is the total inductance including parasitics and C_T
is the total series capacitance including the parasitics.
Zilog
Simple series capacitance is calculated using the following
equation:
1/ C_T
= 1/C₁ + 1/C₂
If C₁
= C₂
1/C_T
C₁
= 2 C₁
= 2C_T
Sample calculation of capacitance C₁ and C₂ for 5.83 MHz
frequency and inductance value of 27 uH:
5.83 (10^6) =
1
2π [2.7 (10^-6) C_T] 1/2
C_T = 27.6 pf
Thus C₁ = 55.2 pf and C₂ = 55.2 pf.
TIMERS
For the Z8E001, 8-bit timers T0 and T1 are available to
function as a pair of independent 8-bit standard timers, or
they can be cascaded to function as a 16-bit PWM timer.
In addition, 8-bit timers T2 and T3 are provided but they
can only operate in cascade to function as a 16-bit stan-
dard timer.
26
PRELIMINARY
DS97Z8X1300