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參數(shù)資料
| 型號： | Z86E61 |
| 廠商： | ZiLOG, Inc. |
| 英文描述： | CMOS Z8 16K/32K EPROM MICROCONTROLLER |
| 中文描述： | Z8 16K/32K的CMOS存儲器單片機 |
| 文件頁數(shù)： | 12/44頁 |
| 文件大小： | 466K |
| 代理商： | Z86E61 |
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12
Z86E61/E63 Z8
MCU
WITH
16K/32K EPROM
P R E L I M I N A R Y
UART OPERATION
Port 3 lines, P37 and P30, are programmed as serial I/O
lines for full-duplex serial asynchronous receiver/trans-
mitter operation. The bit rate is controlled by Counter/
Timer0.
The Z86E61/E63 automatically adds a start bit and two
stop bits to transmitted data (Figure 10). Odd parity is also
available as an option. Eight data bits are always transmit-
ted, regardless of parity selection. If parity is enabled, the
eighth bit is the odd parity bit. An interrupt request (IRQ4)
is generated on all transmitted characters.
Received data must have a start bit, eight data bits, and at
least one stop bit. If parity is on, bit 7 of the received data
is replaced by a parity error flag. Received characters
generate the IRQ3 interrupt request.
D7
D6
D5
D4
D3
D2
D1
D0
Start Bit
Eight Data Bits
Transmitted Data (No Parity)
Two Stop Bits
SP
SP
ST
P
D6
D5
D4
D3
D2
D1
D0
Start Bit
Seven Data Bits
Transmitted Data (With Parity)
Odd Parity
Two Stop Bits
SP
SP
ST
D7
D6
D5
D4
D3
D2
D1
D0
Start Bit
Eight Data Bits
Received Data (No Parity)
One Stop Bit
SP
ST
P
D6
D5
D4
D3
D2
D1
D0
Start Bit
Seven Data Bits
Received Data (With Parity)
Parity Error Flag
One Stop Bit
ST
SP
Figure 10. Serial Data Formats
Auto Latch
.
The Auto Latch puts valid CMOS levels on all
CMOS inputs that are not externally driven. This reduces
excessive supply current flow in the input buffer when it is
not driven by any source.
Note:
P33-P30 inputs differ from the Z86C61/C63 in that
there is no clamping diode to V
because of the EPROM
high voltage detection circuits. Exceeding the V
maxi-
mum specification during standard operating mode may
cause the device to enter EPROM mode
ADDRESS SPACE
Program Memory
. The Z86E61/E63 can address 48
Kbytes (E61) or 32 Kbytes (E63) of external program
memory (Figure 11). The first 12 bytes of program memory
are reserved for the interrupt vectors. These locations
contain six 16-bit vectors that correspond to the six
available interrupts. For EPROM mode, byte 13 to byte
16383 (E61) or 32767 (E63) consists of on-chip EPROM. At
addresses 16384 (E61) or 32768 (E63) and above, the
Z86E61/E63 executes external program memory fetches.
In ROMless mode, the Z86E61/E63 can address up to 64
Kbytes of program memory. Program execution begins at
external location 000C (HEX) after a reset.
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