Z8F0812SJ020EC Zilog, Z8F0812SJ020EC Datasheet - Page 133
![IC ENCORE MCU FLASH 8K 28SOIC](/photos/6/91/69136/269-28-soic_sml.jpg)
Z8F0812SJ020EC
Manufacturer Part Number
Z8F0812SJ020EC
Description
IC ENCORE MCU FLASH 8K 28SOIC
Manufacturer
Zilog
Series
Encore!® XP®r
Datasheet
1.Z8F08200100KIT.pdf
(264 pages)
Specifications of Z8F0812SJ020EC
Core Processor
Z8
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, IrDA, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
19
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
269-3228
- Current page: 133 of 264
- Download datasheet (6Mb)
PS022517-0508
SPI Baud Rate Generator
necessary for SS to deassert between characters to generate the interrupt. The SPI in
SLAVE mode also generates an interrupt if the SS signal deasserts prior to transfer of all
the bits in a character (see description of Slave Abort Error). Writing a 1 to the IRQ bit in
the SPI Status Register clears the pending SPI interrupt request. The
cleared to 0 by the ISR to generate future interrupts. To start the transfer process, an SPI
interrupt can be forced by software writing a 1 to the STR bit in the SPICTL Register.
If the SPI is disabled, an SPI interrupt can be generated by a BRG time-out. This timer
function must be enabled by setting the BIRQ bit in the SPICTL Register. This BRG
time-out does not set the IRQ bit in the SPISTAT Register, just the SPI interrupt bit in the
interrupt controller.
In SPI MASTER mode, the BRG creates a lower frequency serial clock (SCK) for data
transmission synchronization between the Master and the external Slave. The input to the
BRG is the system clock. The SPI Baud Rate High and Low Byte Registers combine to
form a 16-bit reload value, BRG[15:0], for the SPI Baud Rate Generator. The SPI baud
rate is calculated using the following equation:
Minimum baud rate is obtained by setting BRG[15:0] to 0000H for a clock divisor value
of (2 X 65536 = 131072).
When the SPI is disabled, BRG functions as a basic 16-bit timer with interrupt on
time-out. Follow the steps below to configure BRG as a timer with interrupt on time-out:
1. Disable the SPI by clearing the SPIEN bit in the SPI Control Register to 0.
2. Load the desired 16-bit count value into the SPI Baud Rate High and Low Byte
3. Enable BRG timer function and associated interrupt by setting the BIRQ bit in the SPI
When configured as a general-purpose timer, the interrupt interval is calculated using the
following equation:
Interrupt Interval (s) = System Clock Period (s) ×BRG[15:0] ]
registers.
Control Register to 1.
SPI Baud Rate (bits/s)
=
System Clock Frequency (Hz)
------------------------------------------------------------------------------ -
2xBRG[15:0]
Z8 Encore! XP
Product Specification
Serial Peripheral Interface
IRQ
®
bit must be
F0822 Series
120
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