Z16FMC28AG20SG Zilog, Z16FMC28AG20SG Datasheet - Page 108
![Microcontrollers (MCU) 16BIT 128K FL 4KRAM 2UART 12CH 10BIT A/D](/photos/39/69/396954/tqfp-64_sml.jpg)
Z16FMC28AG20SG
Manufacturer Part Number
Z16FMC28AG20SG
Description
Microcontrollers (MCU) 16BIT 128K FL 4KRAM 2UART 12CH 10BIT A/D
Manufacturer
Zilog
Series
Z16FMCr
Datasheet
1.Z16FMC28AG20_EG.pdf
(341 pages)
Specifications of Z16FMC28AG20SG
Processor Series
Z16FMC
Core
ZNEO
Data Bus Width
16 bit
Program Memory Type
Flash
Program Memory Size
128 KB
Data Ram Size
4 KB
Interface Type
I2C, SPI, UART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
46
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Package / Case
LQFP-64
Development Tools By Supplier
Z16FMC28200KITG
Minimum Operating Temperature
0 C
Core Processor
ZNEO
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, IrDA, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
46
Eeprom Size
-
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
Z16FMC28AG20SG
Manufacturer:
Zilog
Quantity:
176
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- Download datasheet (21Mb)
PS028702-1210
PWM Reload Event
PWM Prescaler
PWM Period and Count Resolution
PWM Output Polarity and Off-State
The default off-state and polarity of the PWM outputs are controlled by the option bits
PWMHI and PWMLO. The PWMHI option controls the off-state and polarity for PWM
high-side outputs PWMH0, PWMH1 and PWMH2. The PWMLO option controls the off-
state and polarity for low-side outputs PWML0, PWML1 and PWML2.
The off-state is the value programmed in the option bit. For example, programming
to 1 makes the off-state of PWMH0, PWMH1 and PWMH2 a High logic value and the
active state a Low logic value. Conversely, programming PWMHI to 0 causes the off-state
to be a Low logic value. PWMLO is programmed in a similar manner.
PWM Enable
The MCEN option bit enables output pairs PWM0, PWM1 and PWM2. If the Motor Con-
trol option is not enabled, the PWM outputs remain in a high-impedance state after reset
and is used as alternate functions like general purpose input. If the Motor Control option is
enabled, following a Power-On Reset (POR) the PWM pins enter a high impedance state.
As the internal reset proceeds, the PWM outputs are forced to the off-state as determined
by the PWMHI and PWMLO off-state option bits.
To prevent erroneous PWM pulse-widths and periods, registers that control the timing of
the output are buffered. Buffering causes all the PWM compare values to update. In other
words, the registers controlling the duty cycle and clock source prescaler only take effect
on a PWM reload event. A PWM reload event is configured to occur at the end of each
PWM period or only every 2, 4, or 8 PWM periods by setting the RELFREQ bits in the
PWM Control 1 Register (PWMCTL1). Software indicates that all new values are ready
by setting the READY bit in the PWM Control 0 Register (PWMCTL0) to 1. When the
READY bit is set to 1, the buffered values take effect at the next reload event.
The prescaler decreases the PWM clock signal by factors of 1, 2, 4, or 8 with respect to the
system clock. The PRES[1:0] bit field in the PWM Control 1 Register (PWMCTL1)
controls prescaler operation. This 2-bit PRES field is buffered so that the prescale value
only changes on a PWM Reload event.
The PWM counter operates in two modes to allow edge-aligned and center-aligned out-
puts. Figures 12 and 13illustrate edge and center-aligned PWM outputs. The mode in
which the PWM operates determine the period of the PWM outputs (PERIOD). The pro-
grammed duty-cycle (PWMDC) and the programmed deadband time (PWMDB) deter-
P R E L I M I N A R Y
Z16FMC Series Motor Control MCUs
Multi-Channel PWM Timer
Product Specification
PWMHI
86
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