SB16C1058-TQFP128 IK Semicon Co., Ltd, SB16C1058-TQFP128 Datasheet - Page 43

• Manufacturer Part Number: SB16C1058-TQFP128
• Description: Octal-uart Controller With 256-byte Fifo
• Manufacturer: IK Semicon Co., Ltd

7.13 Global Interrupt Status Register (GISR, Page 2)
7.14 Transmit FIFO Count Register (TCR, Page 2)
GISR is a register that internal eight 16C1050 UARTs share to use. It is used to verify the
generation status of each interrupt of eight 16C1050 UARTs when global interrupt
function is enabled. Table 18 shows GISR bit settings.
TCR shows the number of characters that can be stored in TX FIFO. In 64-byte FIFO
mode, it consists of only TCR[6:0]. If the number of characters that can be stored in TX
FiFO is 0, it is shown as ‘0000_0000’ and if 64, it is shown as ‘0100_0000’. In 256-byte
FIFO mode, it consists of ISR[7] + TCR[7:0]. If the number of characters that can be
stored in TX FiFO is 0, it is shown as ‘0_0000_0000’ and if 255, it is shown as
‘0_1111_1111’. And in case of the maximum number 256, it is shown as ‘1_0000_0000’.
Table 18:
Bit
7
6
4
3
2
1
0
Symbol
GISR[7]
GISR[6]
GISR[5]
GISR[4]
GISR[3]
GISR[2]
GISR[1]
GISR[0]
Global Interrupt Status Register Description
OCTAL UART WITH 256-BYTE FIFO
Description
8
7
6
5
4
3
2
1
th
th
th
th
th
rd
nd
st
0 : Interrupt of 8
1 : Interrupt of 8
0 : Interrupt of 7
1 : Interrupt of 7
0 : Interrupt of 6
1 : Interrupt of 6
0 : Interrupt of 5
1 : Interrupt of 5
0 : Interrupt of 4
1 : Interrupt of 4
0 : Interrupt of 3
1 : Interrupt of 3
0 : Interrupt of 2
1 : Interrupt of 2
0 : Interrupt of 1
1 : Interrupt of 1
1 : Interrupt Non-masking. Global interrupt is generated
UART Interrupt Status.
UART Interrupt Status.
UART Interrupt Status.
UART Interrupt Status.
UART Interrupt Status.
UART Interrupt Status.
UART Interrupt Status.
UART Interrupt Status.
when the value of GISR[0] is ‘1’.
rd
nd
th
th
th
th
th
th
th
th
th
th
rd
nd
st
st
UART channel was not generated.
UART channel was generated.
UART channel was not generated.
UART channel was generated.
UART channel was not generated.
UART channel was generated.
UART channel was not generated.
UART channel was generated.
UART channel was not generated.
UART channel was generated.
UART channel was not generated.
UART channel was generated.
UART channel was not generated.
UART channel was generated.
UART channel was not generated.
UART channel was generated.
IN16C1058
JUNE 2009
REV 1.0
43