ZLF645S2864GP0001 Maxim Integrated, ZLF645S2864GP0001 Datasheet - Page 45

• Manufacturer Part Number: ZLF645S2864GP0001
• Description: 8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
• Manufacturer: Maxim Integrated

Specifications of ZLF645S2864GP0001

• Core: Z8
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 1 KB
• Operating Supply Voltage: 2 V to 3.6 V
• Interface Type: UART
• Number Of Programmable I/os: 5
• Number Of Timers: 2 x 8 bit, 1 x 16 bit
• Processor Series: ZLF645
• Program Memory Type: Flash

Table 20. Port 3 Register (P3)
PS026408-1208
Bit
Field
Reset
R/W
Address
Bit Position
[7]
[6]
[5]
[4]
Port 3 Register
The Port 3 register (see
write access to the port pins P37 through P34.
R/W
Value
P37
Write
Write
Write
Write
7
0
0
1
0
1
0
1
0
1
Description
Port 3, Pin 7 Output—Writes to this bit do not affect the pin state if write-only
register bit PCON[0] is set to1, which configures P37 as the 
Comparator 1 or IR Amplifier output.
P37 asserted Low if PCON[0]=0.
P37 asserted High if PCON[0]=0.
A read returns the last value written to this bit.
Port 3, Pin 6 Output—Writes to this bit do not affect the pin state if register bits
CTR1[7:6]=01, which configures P36 as the Timer 8 and Timer 16 combined
logic output.
P36 asserted Low.
P36 asserted High.
A read returns the last value written to this bit.
Port 3, Pin 5 Output—Writes to this bit do not affect the pin state if register bit
CTR2[0]=1, which configures P35 as the Timer 16 output.
P35 asserted Low.
P35 asserted High.
A read returns the last value written to this bit.
Port 3, Pin 4 Output—Writes to this bit do not affect the pin state if write only
register bit PCON[0]=1 which configures P34 as a Comparator 2 output, register
bit CTR0[0]=1 which configures P34 as Timer 8 output, or if the device is in ICP
mode as described in the
P34 asserted Low.
P34 asserted High.
A read returns the last value written to this bit.
R/W
P36
6
0
R/W
P35
Table
5
0
Banks 0–3: 03h; Linear: 003h
20) allows read access to port pins P33 through P30 and
R/W
P34
ICP Interface
4
0
R/W
P33
X
3
on page 53.
ZLF645 Series Flash MCUs
R/W
P32
X
2
Product Specification
R/W
P31
X
1
Port 3 Register
R/W
P30
X
0
37