MC9S08QG8CFQE Freescale Semiconductor, MC9S08QG8CFQE Datasheet - Page 47
![IC MCU 8K FLASH 8MHZ 8-QFN-D](/photos/12/25/122577/mc9s08qg8cfqe_sml.jpg)
MC9S08QG8CFQE
Manufacturer Part Number
MC9S08QG8CFQE
Description
IC MCU 8K FLASH 8MHZ 8-QFN-D
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.MC9S08QG8CDTER.pdf
(314 pages)
Specifications of MC9S08QG8CFQE
Core Processor
HCS08
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
4
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-DFN
Processor Series
S08QG
Core
HCS08
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
I2C, SCI, SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
4
Number Of Timers
8
Operating Supply Voltage
1.8 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMO9S08QG8E
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
For Use With
DEMO9S08QG8E - BOARD DEMO FOR MC9S08QG8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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0xFFAE
0xFFAF
0xFFB0 –
0xFFB7
0xFFB8 –
0xFFBC
0xFFBD
0xFFBE
0xFFBF
Provided the key enable (KEYEN) bit is 1, the 8-byte comparison key can be used to temporarily
disengage memory security. This key mechanism can be accessed only through user code running in secure
memory. (A security key cannot be entered directly through background debug commands.) This security
key can be disabled completely by programming the KEYEN bit to 0. If the security key is disabled, the
only way to disengage security is by mass erasing the FLASH if needed (normally through the background
debug interface) and verifying that FLASH is blank. To avoid returning to secure mode after the next reset,
program the security bits (SEC01:SEC00) to the unsecured state (1:0).
4.4
The MC9S08QG8/4 includes static RAM. The locations in RAM below 0x0100 can be accessed using the
more efficient direct addressing mode, and any single bit in this area can be accessed with the bit
manipulation instructions (BCLR, BSET, BRCLR, and BRSET). Locating the most frequently accessed
program variables in this area of RAM is preferred.
The RAM retains data when the MCU is in low-power wait, stop2, or stop3 mode. At power-on or after
wakeup from stop1, the contents of RAM are uninitialized. RAM data is unaffected by any reset provided
that the supply voltage does not drop below the minimum value for RAM retention (V
For compatibility with M68HC05 MCUs, the HCS08 resets the stack pointer to 0x00FF. In the
MC9S08QG8/4, it is usually best to reinitialize the stack pointer to the top of the RAM so the direct page
RAM can be used for frequently accessed RAM variables and bit-addressable program variables. Include
the following 2-instruction sequence in your reset initialization routine (where RamLast is equated to the
highest address of the RAM in the Freescale Semiconductor-provided equate file).
When security is enabled, the RAM is considered a secure memory resource and is not accessible through
BDM or through code executing from non-secure memory. See
description of the security feature.
The RAM array is not automatically initialized out of reset.
Freescale Semiconductor
Address
Reserved for
Storage of FTRIM
Reserved for
Storage of ICSTRM
NVBACKKEY
Unused
NVPROT
Unused
NVOPT
RAM
Register Name
LDHX
TXS
#RamLast+1
KEYEN
Bit 7
—
—
—
0
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
Table 4-4. Nonvolatile Register Summary
FNORED
—
—
—
6
0
;point one past RAM
;SP<-(H:X-1)
—
—
—
5
0
0
8-Byte Comparison Key
FPS
—
—
—
4
0
0
TRIM
Section 4.6,
Chapter 4 Memory Map and Register Definition
—
—
—
3
0
0
“Security,” for a detailed
—
—
—
2
0
0
RAM
SEC01
—
—
—
1
0
).
SEC00
FTRIM
FPDIS
Bit 0
—
—
—
45
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