Z8PE003 Datasheet, PDF (28/48 Pages) Zilog, Inc. – FEATURE-ENHANCED Z8PLUS 1K ROM ONE-TIME PROGRAMMABLE (OTP) MICROCONTROLLER

Z8PE003
Z8Plus OTP Microcontroller
ZiLOG
LC OSCILLATOR
The Z8Plus oscillator can use an inductor capacitor oscil-
lator (LC) network to generate an XTAL clock (Figure 17).
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 parasitics.
Simple series capacitance is calculated using the equation
at the top of the next column.
1/ C_T
If C₁
1/C_T
C₁
= 1/C₁ + 1/C₂
= C₂
= 2/C₁
= 2C_T
A sample calculation of capacitance C₁ and C₂ for 5.83-
MHz frequency and inductance value of 27 µH is displayed
as follows:
5.83 (10^6) =
1
2π [27 (10^-6) C_T] ^1/2
C_T = 27.6 pF
Thus, C₁ = 55.2 pF and C₂ = 55.2 pF.
TIMERS
Two 8-bit timers, timer 0 (T0) and timer 1 (T1) are available
to function as a pair of independent 8-bit standard timers.
They may also be cascaded to function as a 16-bit Pulse-
Width Modulator (PWM) timer. Two additional 8-bit tim-
ers (T2 and T3) are provided, but they can only operate as
one 16-bit standard timer.
OSC/8
Enable TCTLL0 (D5)
16-bit Down Counter
IRQ5 (T23)
T3VAL
T3AR
T2AR
T2VAL
Internal Data Bus
Figure 19. 16-Bit Standard Timer
28
PRELIMINARY
DS007500-Z8X0399