IC MCU 1.5K FLASH 16-TSSOP

MC68HC908QY1VDTE

Manufacturer Part NumberMC68HC908QY1VDTE
DescriptionIC MCU 1.5K FLASH 16-TSSOP
ManufacturerFreescale Semiconductor
SeriesHC08
MC68HC908QY1VDTE datasheet
 

Specifications of MC68HC908QY1VDTE

Core ProcessorHC08Core Size8-Bit
Speed8MHzPeripheralsLVD, POR, PWM
Number Of I /o13Program Memory Size1.5KB (1.5K x 8)
Program Memory TypeFLASHRam Size128 x 8
Voltage - Supply (vcc/vdd)2.7 V ~ 5.5 VOscillator TypeInternal
Operating Temperature-40°C ~ 105°CPackage / Case16-TSSOP
Processor SeriesHC08QCoreHC08
Data Bus Width8 bitData Ram Size128 B
Maximum Clock Frequency8 MHzNumber Of Programmable I/os14
Number Of Timers2Maximum Operating Temperature+ 105 C
Mounting StyleSMD/SMTDevelopment Tools By SupplierFSICEBASE, M68CBL05AE, DEMO908QB8, DEMO908QC16
Minimum Operating Temperature- 40 CLead Free Status / RoHS StatusLead free / RoHS Compliant
Eeprom Size-Data Converters-
Connectivity-  
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Central Processor Unit (CPU)
7.3.5 Condition Code Register
The 8-bit condition code register contains the interrupt mask and five flags that indicate the results of the
instruction just executed. Bits 6 and 5 are set permanently to 1. The following paragraphs describe the
functions of the condition code register.
Bit 7
Read:
V
Write:
Reset:
X
X = Indeterminate
Figure 7-6. Condition Code Register (CCR)
V — Overflow Flag
The CPU sets the overflow flag when a two's complement overflow occurs. The signed branch
instructions BGT, BGE, BLE, and BLT use the overflow flag.
1 = Overflow
0 = No overflow
H — Half-Carry Flag
The CPU sets the half-carry flag when a carry occurs between accumulator bits 3 and 4 during an
add-without-carry (ADD) or add-with-carry (ADC) operation. The half-carry flag is required for
binary-coded decimal (BCD) arithmetic operations. The DAA instruction uses the states of the H and
C flags to determine the appropriate correction factor.
1 = Carry between bits 3 and 4
0 = No carry between bits 3 and 4
I — Interrupt Mask
When the interrupt mask is set, all maskable CPU interrupts are disabled. CPU interrupts are enabled
when the interrupt mask is cleared. When a CPU interrupt occurs, the interrupt mask is set
automatically after the CPU registers are saved on the stack, but before the interrupt vector is fetched.
1 = Interrupts disabled
0 = Interrupts enabled
To maintain M6805 Family compatibility, the upper byte of the index
register (H) is not stacked automatically. If the interrupt service routine
modifies H, then the user must stack and unstack H using the PSHH and
PULH instructions.
After the I bit is cleared, the highest-priority interrupt request is serviced first.
A return-from-interrupt (RTI) instruction pulls the CPU registers from the stack and restores the
interrupt mask from the stack. After any reset, the interrupt mask is set and can be cleared only by the
clear interrupt mask software instruction (CLI).
N — Negative Flag
The CPU sets the negative flag when an arithmetic operation, logic operation, or data manipulation
produces a negative result, setting bit 7 of the result.
1 = Negative result
0 = Non-negative result
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6
5
4
3
1
1
H
I
1
1
X
1
NOTE
MC68HC908QY/QT Family Data Sheet, Rev. 6
2
1
Bit 0
N
Z
C
X
X
X
Freescale Semiconductor