Z9025106PSG Zilog, Z9025106PSG Datasheet - Page 78

• Manufacturer Part Number: Z9025106PSG
• Description: IC 32K 8BIT DTC OTP 42-DIP
• Manufacturer: Zilog

Specifications of Z9025106PSG

• Applications: TV Controller
• Core Processor: Z8
• Program Memory Type: OTP (32 kB)
• Controller Series: Digital Television Controller (DTC)
• Ram Size: 300 x 8
• Interface: I²C, 2-Wire Serial
• Number Of I /o: 27
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 42-DIP (0.600", 15.24mm)
• Processor Series: Z902x
• Core: Z8
• Data Bus Width: 8 bit
• Program Memory Size: 32 KB
• Data Ram Size: 300 B
• Interface Type: I2C
• Maximum Clock Frequency: 6 MHz
• Number Of Programmable I/os: 27
• Mounting Style: Through Hole
• On-chip Adc: 4 bit, 4 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.2
PWM1 through PWM11
Two data registers (PWM11H and PWM11L) hold the 14-bit PWM11 ratio. If PWM6
is configured to 14-bit, two data registers (PWM6H and PWM6L) hold the 14-bit
PWM6 ratio. The upper 7 bits control the width of the distributed pulse. The lower
7 bits distribute the minimum resolution pulse in the various time slots. Using this
technique, the pseudo-repetition of frequency is raised up to 128 times faster than
ordinary pulse width modulation.
There are 128 time slots which start from time slot 7Fh to 0h because a 14-bit
binary down counter is used. When the glitch exceeds 127 pulses, the upper 7
bits take precedence and fill 128 pulses of the same width in different locations.
Generating the pulse-train output requires the following equation: Time slot (Fts)
and one cycle of frequency (F14).
When the 6-bit data is 00h, the PWM output is Low. The maximum value is 3Fh
and emits High DC-level output.
A selected PWM cycle/frequency is shown in the following equation:
Bit/
Field
Reserved
P47/
PWM 10
P46/
PWM9
P45/
PWM 8
P44/
PWM 7
Reserved
Fdp (Distribution pulse frequency)=XTAL/128 (Hz)
Fts (Time slot frequency) = XTAL/128 (Hz)
F14 (a cycle/frequency) = XTAL /16384 (Hz)
F6 (a cycle/frequency) = XTAL/16/64 (Hz)
Bit
Position
7, 6
5
4
3
2
1, 0
R/W Value Description
R/W
R/W
R/W
R/W
W
W
R
R
32 KB Television Controller with OSD
0
1
0
1
0
1
0
1
Return 1
No effect
Select PWM 10
Select P47 - POR
Select PWM 9
Select P46 - POR
Select PWM 8
Select P45 - POR
Select PWM 7
Select P44 - POR
Return 1
No effect
PS001301-0800
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