ZLF645E0P2832G Zilog, ZLF645E0P2832G Datasheet - Page 114

• Manufacturer Part Number: ZLF645E0P2832G
• Description: Microcontrollers (MCU) 32K Flash 1K RAM 28 pin
• Manufacturer: Zilog

Specifications of ZLF645E0P2832G

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 1 KB
• Interface Type: ICP, UART
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-28
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: Details

PS026407-0408
Timer Output
Initiating PING-PONG Mode
First, ensure that both counter/timers are not running.
Follow the steps below to initiate the PING-PONG mode:
1. Set T8 into SINGLE-PASS mode (CTR0, bit 6)
2. Set T16 into SINGLE-PASS mode (CTR2, bit 6)
3. Set the PING-PONG mode (CTR1 bits [3:2])
4. Finally, start PING-PONG mode by enabling either T8 (CTR0, D7) or T16 (CTR2,
If you stop the timer and restart the timer, reload the initial value to avoid an unknown
previous value.
During PING-PONG Mode
The enable bits of T8 and T16 (CTR0, D7; CTR2, D7) are set and cleared alternately by
hardware. The time-out bits (CTR0, bit 5; CTR2, bit 5) are set every time the counter/
timers reach the terminal count.
The output logic for the timers is displayed in
T8_OUT when bit 0 of CTR0 is set. P35 is used to output the value of T16_OUT when bit
Enable
Enable
These instructions are not consecutive and can occur in random order.
D7). The initial value of T8 or T16 must not be
TC8
TC16
Time-out
Figure 38. PING-PONG Mode Diagram
Time-out
Figure 39
1
.
on page 107. P34 is used to output
ZLF645 Series Flash MCUs
Counter/Timer Functional Blocks
Product Specification
Ping-Pong
CTR1 data bits [3:2]
106