Z8F3221PM020SG Zilog, Z8F3221PM020SG Datasheet - Page 95

• Manufacturer Part Number: Z8F3221PM020SG
• Description: IC ENCORE MCU FLASH 32K 40DIP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F3221PM020SG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 29
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.620", 15.75mm)
• Processor Series: Z8F322x
• Core: eZ8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: I2C, SPI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 29
• Number Of Timers: 3
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Development Tools By Supplier: Z8F64200100KITG, ZENETSC0100ZACG, ZUSBSC00100ZACG, Z8F64210100ZDA, Z8F64210100ZDP, Z8F64210100ZDV, Z8F64220100ZDA, Z8F64220100ZDV, Z8F6422AR00ZEM, Z8F6422VS00ZEM, Z8F6421AN00ZEM
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: 770-1002 - ISP 4PORT ZILOG Z8 ENCORE! MCU269-4643 - KIT DEV Z8 ENCORE XP 28-PIN269-4630 - DEV KIT FOR Z8 ENCORE 8K/4K269-4629 - KIT DEV Z8 ENCORE XP 28-PIN269-4628 - KIT DEV Z8 ENCORE XP 8-PIN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 269-4257; Z8F3221PM020SG

PS019918-1206
Follow the steps below for configuring a timer for PWM mode and initiating the PWM
operation:
1. Write to the Timer Control 1 register to:
2. Write to the Timer High and Low Byte registers to set the starting count value
3. Write to the PWM High and Low Byte registers to set the PWM value.
4. Write to the Timer Reload High and Low Byte registers to set the Reload value (PWM
5. If desired, enable the timer interrupt and set the timer interrupt priority by writing to
6. Configure the associated GPIO port pin for the Timer Output alternate function.
7. Write to the Timer Control 1 register to enable the timer and initiate counting.
The PWM period is given by the following equation:
If an initial starting value other than
registers, the ONE-SHOT mode equation must be used to determine the first PWM time-
out period.
If TPOL is set to 0, the ratio of the PWM output High time to the total period is given by:
If TPOL is set to 1, the ratio of the PWM output High time to the total period is given by:
CAPTURE Mode
In CAPTURE mode, the current timer count value is recorded when the desired external
Timer Input transition occurs. The Capture count value is written to the Timer PWM High
and Low Byte Registers. The timer input is the system clock. The TPOL bit in the Timer
Control 1 register determines if the Capture occurs on a rising edge or a falling edge of the
Timer Input signal. When the Capture event occurs, an interrupt is generated and the timer
continues counting.
PWM Period (s)
PWM Output High Time Ratio (%)
PWM Output High Time Ratio (%)
–
–
–
–
(typically
reset in PWM mode, counting always begins at the reset value of
period). The Reload value must be greater than the PWM value.
the relevant interrupt registers.
Disable the timer
Configure the timer for PWM mode
Set the prescale value
Set the initial logic level (High or Low) and PWM High/Low transition for the
Timer Output alternate function
0001H
=
------------------------------------------------------------------------
System Clock Frequency (Hz)
). This only affects the first pass in PWM mode. After the first timer
Reload Value
=
=
×
Prescale
Reload Value
--------------------------------------------------------------------- -
--------------------------------
Reload Value
0001H
PWM Value
Reload Value
is loaded into the Timer High and Low Byte
∠
×
100
PWM Value
Z8 Encore!
×
Product Specification
100
0001H
®
.
64K Series
Timers
82