Z8F041APH020SG2156 ZiLOG, Z8F041APH020SG2156 Datasheet - Page 147

• Manufacturer Part Number: Z8F041APH020SG2156
• Description: 8-bit Microcontrollers - MCU 4K FLASH 1K RAM 128B NVDS
• Manufacturer: ZiLOG

Specifications of Z8F041APH020SG2156

• Rohs: yes
• Core: eZ8
• Processor Series: Z8F041xx
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 4 KB
• Data Ram Size: 1 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.7 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: PDIP-20
• Mounting Style: Through Hole
• A/d Bit Size: 10 bit
• A/d Channels Available: 8
• Interface Type: UART
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 17
• Number Of Timers: 2
• Program Memory Type: Flash
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V

PS022827-1212
Note:
Caution:
ADC Compensation Details
High-efficiency assembly code that performs ADC compensation is available for down-
load on www.zilog.com. This section offers a bit-specific description of the ADC compen-
sation process used by this code.
The following data bit definitions are used:
0–9, a–f = bit indices in hexadecimal
s = sign bit
v = overflow bit
– = unused
Input Data
The offset compensation is performed first, followed by the gain compensation. One bit of
resolution is lost because of rounding on both the offset and gain computations. As a
result the ADC registers read back 13 bits: 1 sign bit, two calibration bits lost to rounding
and 10 data bits.

Also note that in the second term, the multiplication must be performed before the divi-
sion by 2
MSB
s b a 9 8 7 6 5
s s s s s 7 6 5
s e d c b a 9 8
Although the ADC can be used without the gain and offset compensation, it does exhibit
nonunity gain. Designing the ADC with sub-unity gain reduces noise across the ADC
range but requires the ADC results to be scaled by a factor of 8/7.
16
. Otherwise, the second term incorrectly evaluates to zero.
LSB
4 3 2 1 0 – – v
s 6 5 4 3 2 1 0
4 3 2 1 0 0 0 0
7 6 5 4 3 2 1 0
P R E L I M I N A R Y
(ADC)
(Offset)
(Gain)
Z8 Encore! XP
ADC Output Word; if v =
1, the data is invalid
Offset Correction Byte
Offset Byte shifted to align
with ADC data
Gain Correction Word
Product Specification
®
F082A Series
Operation
130