Z8F16800144ZCOG Zilog, Z8F16800144ZCOG Datasheet - Page 305

• Manufacturer Part Number: Z8F16800144ZCOG
• Description: KIT DEV FOR Z8F642 MCU 44 PIN
• Manufacturer: Zilog
• Series: Z8 Encore!®r
• Type: MCUr

Specifications of Z8F16800144ZCOG

• Contents: Hardware, Software and Documentation
• For Use With/related Products: Z8F642
• For Use With: 269-4661 - KIT ACC ETHERNET SMART CABLE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4678

PS025011-1010
Transmit Flow Control
Breakpoints
This will reset the Auto-Baud and indicate to the host that a new Auto-Baud character
should be sent.
Transmit flow control is implemented by the use of a remote start bit. When transmit flow
control is enabled, the transmitter will wait for the remote host to send the start bit. Trans-
mit flow control is useful in applications where receive overruns can occur.
The remote host can transmit a remote start bit by sending the character
mitter will append its data after the start bit. Due to the wire-and nature of the open drain
bus, the start bit sent by the remote host and the data bits sent by the Z8 Encore! XP F1680
Series device appear as one character. This is displayed in
Execution Breakpoints are generated using the BRK instruction (opcode
eZ8 CPU decodes a BRK instruction, it signals the On-Chip Debugger. If Breakpoints are
enabled, the OCD idles the eZ8 CPU and enters DEBUG mode. If Breakpoints are not
enabled, the OCD ignores the BRK signal and the
instruction.
If breakpoints are enabled, the OCD can be configured to automatically enter DEBUG
mode, or to loop on the break instruction. If the OCD is configured to loop on the BRK
instruction, then the CPU remains able to service interrupt requests.
The loop on BRK instruction can service interrupts in the background. For interrupts to be
serviced in the background, there cannot be any breakpoints in the interrupt service rou-
tine. Otherwise, the CPU stops on the breakpoint in the interrupt routine. For interrupts to
be serviced in the background, interrupts must also be enabled. Debugging software does
Receiving
Device
Transmitting
Device
Single Wire
Bus
ST = Start Bit
SP = Stop Bit
D0-D7 = Data Bits
Figure 61. Start Bit Flow Control
ST
ST
D0
D0
P R E L I M I N A R Y
D1
D1
D2
D2
D3
D3
D4
D4
BRK
D5
D5
instruction operates as an NOP
Z8 Encore! XP
D6
D6
Figure
D7
D7
Product Specification
61.
SP
SP
FFH
®
00H
On-Chip Debugger
F1680 Series
. The trans-
). When the
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