MC68HC711D3_05 Datasheet, PDF (133/138 Pages) Freescale Semiconductor, Inc – Microcontrollers

B.2.3 Control Timing
MC68L11D0 Electrical Characteristics
Characteristic⁽¹⁾
Frequency of operation
E-clock period
Crystal frequency
External oscillator frequency
Processor control setup time
t_PCSU = 1/4 t_cyc + 50 ns
Reset input pulse width⁽²⁾
To guarantee external reset vector
Minimum input time can be preempted by internal reset
Interrupt pulse width, PW_IRQ = t_cyc + 20 ns
IRQ edge-sensitive mode
Wait recovery startup time
Timer pulse width PW_TIM = t_cyc + 20 ns
Input capture pulse accumulator input
Symbol
f_O
t_cyc
f_XTAL
4 f_O
t_PCSU
1.0 MHz
Min Max
dc
1.0
1000 —
—
4.0
dc
4.0
325
—
2.0 MHz
Min Max
dc 2.0
500 —
— 8.0
dc 8.0
200 —
Unit
MHz
ns
MHz
MHz
ns
PW_RSTL
8
1
—
8
—
t_cyc
—
1
—
PW_IRQ
1020
—
520
—
ns
t_WRS
—
4
—
4
t_cyc
PW_TIM
1020
—
520
—
ns
1. V_DD = 3.0 Vdc to 5.5 Vdc, V_SS = 0 Vdc, T_A = T_L to T_H. All timing is shown with respect to 20% V_DD and 70% V_DD, unless
otherwise noted.
2. Reset is recognized during the first clock cycle it is held low. Internal circuitry then drives the pin low for four clock cycles,
releases the pin, and samples the pin level two cycles later to determine the source of the interrupt. Refer to Chapter 4
Resets, Interrupts, and Low-Power Modes for further details.
B.2.4 Peripheral Port Timing
Characteristic⁽¹⁾
Symbol
1.0 MHz
Min
Max
2.0 MHz
Unit
Min
Max
Frequency of operation (E-clock frequency)
E-clock period
Peripheral data setup time⁽²⁾
MCU read of ports A, B, C, and D
f_O
dc
1.0
dc
2.0
MHz
t_cyc
1000
—
500
—
ns
t_PDSU
100
—
100
—
ns
Peripheral data hold time⁽²⁾
MCU read of ports A, B, C, and D
t_PDH
50
—
50
—
ns
Delay time, peripheral data write
MCU write to port A
MCU writes to ports B, C, and D
t_PWD = 1/4 t_cyc + 150 ns
t_PWD
—
200
—
200
ns
—
350
—
225
1. V_DD = 3.0 Vd to 5.5 Vdc, V_SS = 0 Vdc, T_A = T_L to T_H. All timing is shown with respect to 20% V_DD and 70% V_DD, unless
otherwise noted.
2. Port C and D timing is valid for active drive (CWOM and DWOM bits not set in PIOC and SPCR registers respectively).
MC68HC711D3 Data Sheet, Rev. 2.1
Freescale Semiconductor
133