Z8F082AHH020SG2156 Zilog, Z8F082AHH020SG2156 Datasheet - Page 27

• Manufacturer Part Number: Z8F082AHH020SG2156
• Description: IC ENCORE XP MCU FLASH 8K
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F082AHH020SG2156

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 17
• 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
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: Q5278375

PROGRAM MEMORY
UM012811-0904
Register File Precautions
AND R15, DFH
Figure 5. 16-Bit Register Pair Addressing
Bit Addressing
Many eZ8 CPU instructions allow access to individual bits within registers. Figure 6 illus-
trates how the instruction AND R15, MASK can clear an individual bit.
Figure 6. Bit Addressing Example
Some control registers within the Register File provide Read-Only or Write-Only access.
When accessing these Read-Only or Write-Only registers, insure that the instructions do
not attempt to read from a Write-Only register or, conversely, write to a Read-Only regis-
ter. To determine which control registers allow either Read-Only or Write-Only access,
refer to the device-specific Product Specification.
The eZ8 CPU can access 64KB (65,536 bytes) of Program Memory. The Program Mem-
ory provides storage for both executable program code and data. For each product within
the eZ8 CPU family, a block of Program Memory beginning at address
for option bits, the Reset vector, the Watch-Dog Timer time-out vector, the Illegal Instruc-
tion Trap vector, and the Interrupt vectors. The rest of the Program Memory stores code
Bit
7
0
1
0
MSB
1
1
1
n = Even Address
Rn
1
0
0
1
1
1
Rn+1
LSB
0
1
0
; Clear Bit 5 of Working Register 15
0
1
0
0
1
0
Bit
0
0
1
0
R15
MASK = DFH
R15
0000H
Address Space
User Manual
is reserved
eZ8 CPU
17