S9S08SG4E2CSC Freescale Semiconductor, S9S08SG4E2CSC Datasheet - Page 73
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S9S08SG4E2CSC
Manufacturer Part Number
S9S08SG4E2CSC
Description
MCU 4K FLASH 8-SOIC
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.S9S08SG4E2CSC.pdf
(316 pages)
Specifications of S9S08SG4E2CSC
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, LIN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
4
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (3.9mm Width)
Processor Series
S08SG
Core
HCS08
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
I2C, SPI, SCI
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
16
Number Of Timers
2
Operating Supply Voltage
- 0.3 V to + 5.8 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMO9S08SG32, DEMO9S08SG32AUTO, DEMO9S08SG8, DEMO9S08SG8AUTO
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 12 Channel
On-chip Dac
10 bit, 12 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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Chapter 6
Parallel Input/Output Control
This section explains software controls related to parallel input/output (I/O) and pin control. The
MC9S08SG8 has three parallel I/O ports which include a total of 16 I/O pins. See
Connections,” for more information about pin assignments and external hardware considerations of these
pins.
Many of these pins are shared with on-chip peripherals such as timer systems, communication systems, or
pin interrupts as shown in
functions so that when a peripheral is enabled, the I/O functions associated with the shared pins are
disabled.
After reset, the shared peripheral functions are disabled and the pins are configured as inputs
(PTxDDn = 0). The pin control functions for each pin are configured as follows: slew rate disabled
(PTxSEn = 0), low drive strength selected (PTxDSn = 0), and internal pull-ups disabled (PTxPEn = 0).
6.1
Reading and writing of parallel I/Os are performed through the port data registers. The direction, either
input or output, is controlled through the port data direction registers. The parallel I/O port function for an
individual pin is illustrated in the block diagram shown in
The data direction control bit (PTxDDn) determines whether the output buffer for the associated pin is
enabled, and also controls the source for port data register reads. The input buffer for the associated pin is
always enabled unless the pin is enabled as an analog function or is an output-only pin.
When a shared digital function is enabled for a pin, the output buffer is controlled by the shared function.
However, the data direction register bit will continue to control the source for reads of the port data register.
When a shared analog function is enabled for a pin, both the input and output buffers are disabled. A value
of 0 is read for any port data bit where the bit is an input (PTxDDn = 0) and the input buffer is disabled.
In general, whenever a pin is shared with both an alternate digital function and an analog function, the
analog function has priority such that if both the digital and analog functions are enabled, the analog
function controls the pin.
Freescale Semiconductor
Port Data and Data Direction
Not all general-purpose I/O pins are available on all packages. To avoid
extra current drain from floating input pins, the user’s reset initialization
routine in the application program must either enable on-chip pull-up
devices or change the direction of unconnected pins to outputs so the pins
do not float.
Table
2-1. The peripheral modules have priority over the general-purpose I/O
MC9S08SG8 MCU Series Data Sheet, Rev. 6
NOTE
Figure
6-1.
Chapter 2, “Pins and
72
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