參數(shù)資料
型號: Z86E40
廠商: ZiLOG, Inc.
英文描述: Z8 4K OTP Microcontroller( Z8系列4k ROM一次可編程微控制器)
中文描述: Z8 4K的檢察官辦公室的微控制器(Z8系列4K的ROM的一次可編程微控制器)
文件頁數(shù): 26/64頁
文件大小: 391K
代理商: Z86E40
Z86E30/E31/E40
Z8 4K OTP Microcontroller
Zilog
26
P R E L I M I N A R Y
DS97Z8X0502
PIN FUNCTIONS
(Continued)
Port 1
(P17–P10). Port 1 is an 8-bit, bidirectional, CMOS-
compatible port with multiplexed Address (A7–A0) and
Data (D7–D0) ports. These eight I/O lines can be pro-
grammed as inputs or outputs or can be configured under
software control as an Address/Data port for interfacing
external memory. The input buffers are Schmitt-triggered
and the output buffers can be globally programmed as ei-
ther push-pull or open-drain. Low EMI output buffers can
be globally programmed by the software. Port 1 can be
placed under handshake control. In this configuration, Port
3, lines P33 and P34 are used as the handshake controls
RDY1 and /DAV1 (Ready and Data Available). To inter-
face external memory, Port 1 must be programmed for the
multiplexed Address/Data mode. If more than 256 external
locations are required, Port 0 outputs the additional lines
(Figure 19).
Port 1 can be placed in the high-impedance state along
with Port 0, AS, DS, and R/W, allowing the Z86E40 to
share common resources in multiprocessor and DMA ap-
plications.
Figure 19. Port 1 Configuration (Z86E40 Only)
In
1.5 2.3V Hysteresis
PAD
OEN
Out
Open-Drain
Auto Latch
R 500 k
Port 2 (I/O)
Handshake Controls
DAV1 and RDY1
(P33 and P34)
MCU
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