參數(shù)資料
型號: MC9RS08KA1CSCR
廠商: Freescale Semiconductor
文件頁數(shù): 77/136頁
文件大?。?/td> 0K
描述: IC MCU 8-BIT 1K FLASH 8-SOIC
產(chǎn)品培訓模塊: Mechatronics
USBSpyder08 Discovery Kit
RS08KA2 Low-End Microcontroller Series
MC9RS08KA8 Microcontroller
標準包裝: 1
系列: RS08
核心處理器: RS08
芯體尺寸: 8-位
速度: 10MHz
外圍設備: LVD,POR,WDT
輸入/輸出數(shù): 4
程序存儲器容量: 1KB(1K x 8)
程序存儲器類型: 閃存
RAM 容量: 63 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
包裝: 標準包裝
產(chǎn)品目錄頁面: 726 (CN2011-ZH PDF)
其它名稱: MC9RS08KA1CSCRDKR
MC9RS08KA2 Series Data Sheet, Rev. 4
Freescale Semiconductor
45
Chapter 6
Parallel Input/Output Control
This section explains software controls related to parallel input/output (I/O) and pin control. The
MC9RS08KA2 Series has one parallel I/O port, which includes two I/O pins in the 6-pin package or four
I/O pins in the 8-pin packages, one output-only pin, and one input-only pin. See Chapter 2, “Pins and
Connections,” for more information about pin assignments and external hardware considerations for these
pins.
All of these I/O pins are shared with on-chip peripheral functions as shown in Table 2-1. The peripheral
modules have priority over the I/Os so that when a peripheral is enabled, the I/O functions associated with
the shared pins are disabled. After reset, the shared peripheral functions are disabled so that the pins are
controlled by the I/O. All of the I/Os are configured as inputs (PTADDn = 0) with pullup/pulldown devices
disabled (PTAPEn = 0), except for output-only pin PTA3, which defaults to the BKGD/MS function.
Reading and writing of parallel I/Os is performed through the port data registers. The direction, either input
or output, is controlled through the port data direction registers. The parallel I/O port function for an
individual pin is illustrated in the block diagram shown in Figure 6-1.
Figure 6-1. Parallel I/O Block Diagram
The data direction control bit (PTADDn) determines whether the output buffer for the associated pin is
enabled, and also controls the source for port data register reads. The input buffer for the associated pin is
always enabled unless the pin is enabled as an analog function or is an output-only pin.
Q
D
Q
D
1
0
Port Read
PTADDn
PTADn
Output Enable
Output Data
Input Data
Synchronizer
Data
BUSCLK
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