參數(shù)資料
型號: UPD78F9512GR-JJG-A
廠商: Renesas Electronics America
文件頁數(shù): 144/175頁
文件大小: 0K
描述: MCU 8BIT SGL CHIP 16PIN
標準包裝: 400
系列: 78K0S/Kx1+
核心處理器: 78K0S
芯體尺寸: 8-位
速度: 10MHz
外圍設(shè)備: LVD,POR,PWM,WDT
輸入/輸出數(shù): 13
程序存儲器容量: 4KB(4K x 8)
程序存儲器類型: 閃存
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 16-SSOP(0.173",4.40mm 寬)
包裝: 托盤
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16994EJ6V0UD
68
(1) Port mode registers (PM2 to PM4)
These registers are used to set the corresponding port to the input or output mode in 1-bit units.
Each port mode register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets these registers to FFH.
When a port pin is used as an alternate-function pin, set its port mode register and output latch as shown in
Table 4-3.
Caution
Because P21 and P32 are also used as external interrupt pins, the corresponding interrupt
request flag is set if each of these pins is set to the output mode and its output level is
changed. To use the port pin in the output mode, therefore, set the corresponding interrupt
mask flag to 1 in advance.
Figure 4-8. Format of Port Mode Register
Address: FF22H, After reset: FFH, R/W
Symbol
7
6
5
4
3
2
1
0
PM2
1
PM23
PM22
PM21
PM20
Address: FF23H, After reset: FFH, R/W
Symbol
7
6
5
4
3
2
1
0
PM3
1
PM32
1
Address: FF24H, After reset: FFH, R/W
Symbol
7
6
5
4
3
2
1
0
PM4
PM47
PM46
PM45
PM44
PM43
PM42
PM41
PM40
PMmn
Selection of I/O mode of Pmn pin (m = 2 to 4; n = 0 to 7)
0
Output mode (output buffer ON)
1
Input mode (output buffer OFF)
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